Whenever you attack, you may sacrifice another creature or an artifact. If you do, create a 4/1 black Skeleton creature token with menace that's tapped and attacking. (It can't be blocked except by two or more creatures.) Choose a Background (You can have a Background as a second commander.)

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.) Other creatures you control have melee. (If a creature has multiple instances of melee, each triggers separately.)

Attacking creatures you control have double strike.

Attacking non-Human creatures you control get +1/+0 and have trample.

(Gain the next level as a sorcery to add its ability.) Spells your opponents cast during your turn cost {1} more to cast. {2}{W}: Level 2 Creatures you control get +1/+1. {4}{W}: Level 3 Whenever you attack, until end of turn, target attacking creature gets +1/+1 for each other attacking creature and gains double strike.

During your turn, creature tokens you control get +1/+4. {3}{W}: Create a 1/1 white Soldier creature token. Partner (You can have two commanders if both have partner.)

Flying Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.) Lieutenant — As long as you control your commander, other creatures you control have melee.

(Gain the next level as a sorcery to add its ability.) Whenever one or more tokens you control enter, draw a card. This ability triggers only once each turn. {W}: Level 2 When this Class becomes level 2, create a token that's a copy of target token you control. {3}{W}: Level 3 Creature tokens you control get +2/+2.

As an additional cost to cast this spell, sacrifice an artifact or discard a card. Draw two cards.

When this artifact enters or is put into a graveyard from the battlefield, draw a card.

{T}: Draw a card. Activate only if you created a token this turn. {8}, {T}, Sacrifice this artifact: Create a 10/10 colorless Eldrazi creature token.

Attacking tokens you control have double strike. Whenever one or more tokens you control attack a player, exile the top card of your library. During any turn you attacked with a token, you may play that card.

Whenever a creature you control dies, scry 1 and put an oil counter on this artifact. {1}, {T}, Remove two oil counters from this artifact: Draw a card.

When this creature enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Alliance — Whenever another creature you control enters, scry 1. If this is the second time this ability has resolved this turn, draw a card instead.

When this artifact enters, create a 1/1 white Spirit creature token with flying. Whenever you create one or more creature tokens, put a story counter on this artifact. {W}, {T}, Remove a story counter from this artifact: Draw a card.

When this creature enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

{1}, {T}, Discard a card: You gain 4 life. {1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token. {1}, {T}, Sacrifice a creature: Return target artifact card from your graveyard to your hand. {1}, {T}, Sacrifice an artifact: Draw a card.

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.

Spree (Choose one or more additional costs.) + {2}{R} — Untap all creatures you control. If it's your combat phase, there is an additional combat phase after this phase. + {2} — Creatures you control get +1/+0 and gain first strike until end of turn. + {R} — Choose target opponent. Whenever a creature you control deals combat damage to that player this turn, create a tapped Treasure token.

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.

({T}: Add {R} or {W}.) This land enters tapped.

{T}: Add {C}. {T}: Add {R} or {W}. This land deals 1 damage to you.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{W}.

{T}: Add {C}. {2}, {T}, Sacrifice this land: Return target artifact card from your graveyard to your hand.

{T}: Add one mana of any color in your commander's color identity.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

As this land enters, you may reveal a Mountain or Plains card from your hand. If you don't, this land enters tapped. {T}: Add {R} or {W}.

({T}: Add {R}.)

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

({T}: Add {W}.)

This land enters tapped. {T}: Add {R} or {W}. {1}{R}{W}: This land becomes a 2/2 red and white Ox creature until end of turn. It's still a land. Whenever this land attacks, put a +1/+1 counter on target creature you control.

({T}: Add {R} or {W}.) This land enters tapped.

This land enters tapped. When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.) {T}: Add {R} or {W}.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Target permanent gains hexproof and indestructible until end of turn. If it's an artifact creature, it gets +2/+2 until end of turn.

Creatures you control get +1/+0 and gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Cast this spell only before attackers are declared. You choose which creatures attack this turn. You choose which creatures block this turn and how those creatures block.

Populate. Creatures you control gain indestructible until end of turn. (To populate, create a token that's a copy of a creature token you control.)

Creatures you control gain indestructible until end of turn. Addendum — If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.

For Mirrodin! (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.) Equipped creature gets +2/+2. Whenever equipped creature attacks, if it's the first combat phase of the turn, untap each attacking creature. After this phase, there is an additional combat phase. Equip {3}{R}

{T}: Add one mana of any color in your commander's color identity.

When this creature dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Encore {3}{R} ({3}{R}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

When this artifact enters or is put into a graveyard from the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

{T}: Add {C}{C}.

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

Choose two — • Destroy all artifacts. • Destroy all enchantments. • Destroy all creatures with mana value 3 or less. • Destroy all creatures with mana value 4 or greater.

When this Case enters, choose target creature you don't control. Each creature you control deals 1 damage to that creature. To solve — Three or more creatures attacked this turn. (If unsolved, solve at the beginning of your end step.) Solved — Creatures you control get +1/+0.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Destroy all nontoken creatures.

Lightning Bolt deals 3 damage to any target.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Exile target creature. Its controller gains life equal to its power.

Whenever a creature you control enters, it deals damage equal to its power to any target.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")

+1: Create three 1/1 white Soldier creature tokens. −3: Destroy all creatures with power 4 or greater. −7: You get an emblem with "Creatures you control get +2/+2 and have flying."

When this creature dies, create a 1/1 white Human Soldier creature token.

First strike, menace Whenever Kari Zev attacks, create Ragavan, a legendary 2/1 red Monkey creature token. Ragavan enters tapped and attacking. Exile that token at end of combat.

Creatures you control have myriad. (Whenever a creature with myriad attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) At the beginning of combat on your turn, create a 1/1 red Goblin creature token. That token gains haste until end of turn and attacks this combat if able.

Haste Lieutenant — At the beginning of combat on your turn, if you control your commander, create a 1/1 colorless Thopter artifact creature token with flying. That token gains haste until end of turn.

When this enchantment enters, create a 1/1 white Spirit creature token with flying. Morbid — At the beginning of your end step, if a creature died this turn, populate. (Create a token that's a copy of a creature token you control.)

Squad {3} (As an additional cost to cast this spell, you may pay {3} any number of times. When this creature enters, create that many tokens that are copies of it.) Vigilance Whenever a creature token you control enters, put a +1/+1 counter on it.

Lieutenant — At the beginning of combat on your turn, if you control your commander, create two 1/1 red Goblin creature tokens. Those tokens gain haste until end of turn. {2}, Sacrifice a Goblin: This creature deals 1 damage to any target.

Flying Whenever this creature attacks, create a 1/1 white Soldier creature token that's tapped and attacking.

Create X 1/1 black Rat creature tokens with "This token can't block." Creatures you control gain haste until end of turn.