This land enters tapped unless you control a Mountain. {T}: Add {R}. {R}, {T}, Exert this land: Add {R}{R}. If that mana is spent on a creature spell, it gains haste until end of turn. (An exerted permanent won't untap during your next untap step.)

{T}: Add {C}. Basic landcycling {1} ({1}, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

{T}: Add {C}. {U/R}, {T}: Add {U}{U}, {U}{R}, or {R}{R}.

This land enters tapped unless you control a Mountain. {T}: Add {R}. {1}{R}{R}, {T}: Creatures you control get +1/+0 until end of turn.

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

This land enters tapped. When this land enters, it deals 1 damage to target opponent. {T}: Add {U} or {R}.

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

{T}, Pay 1 life: Add {U} or {R}. {1}, {T}, Sacrifice this land: Draw a card.

({T}: Add {U}.)

This land enters tapped. {T}: Add {U} or {R}.

({T}: Add {R}.)

{T}: Add {C}. {2}{R}, {T}: Shivan Gorge deals 1 damage to each opponent.

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

This land enters tapped unless you control two or fewer other lands. {T}: Add {U} or {R}.

This land enters tapped unless you control an Island or a Mountain. {T}: Add {U} or {R}.

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 {U} or {R}.

Blazing Volley deals 1 damage to each creature your opponents control.

This spell costs {X} less to cast, where X is the total amount of noncombat damage dealt to your opponents this turn. Trample Whenever a source you control deals noncombat damage to an opponent, this creature deals that much damage to target creature or planeswalker that player controls.

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

Electrickery deals 1 damage to target creature you don't control. Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Defender Whenever you cast an instant or sorcery spell, this creature deals 1 damage to each opponent.

End the Festivities deals 1 damage to each opponent and each creature and planeswalker they control.

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

{T}: This creature deals 1 damage to any target. Whenever you cast an instant or sorcery spell, you may untap this creature.

Grapeshot deals 1 damage to any target. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

({R/P} can be paid with either {R} or 2 life.) Gut Shot deals 1 damage to any target.

Whenever a creature you control enters, this enchantment deals 1 damage to each opponent.

Whenever you cast a noncreature spell, this creature deals 1 damage to each opponent.

Whenever another creature you control enters, this creature deals 1 damage to each opponent. Unearth {R} ({R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

This creature has first strike during your turn. Whenever an opponent draws a card, this creature deals 1 damage to them.

Scouring Sands deals 1 damage to each creature your opponents control. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Tap two untapped artifacts and/or creatures you control: This creature deals 1 damage to each opponent. Activate only as a sorcery.

Tectonic Hazard deals 1 damage to each opponent and each creature they control.

Defender {T}: This creature deals 1 damage to each opponent. Whenever you cast an instant or sorcery spell, untap this creature.

Defender {T}: This creature deals 1 damage to each opponent. Whenever you cast an instant or sorcery spell, untap this creature.

Counter target noncreature spell. Its controller creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.")

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep. You draw a card at the beginning of the next turn's upkeep.

Choose target spell, then flip a coin. If you win the flip, gain control of that spell and you may choose new targets for it. If you lose the flip, counter that spell.

Counter target noncreature spell.

Draw two cards, then discard two cards. Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Draw two cards, then discard two cards. Untap up to three lands.

({U/P} can be paid with either {U} or 2 life.) Look at target player's hand. Draw a card.

Draw a card. Madness {U} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Scry 1. (Look at the top card of your library. You may put that card on the bottom.) Draw a card.

Look at the top three cards of your library, then put them back in any order. You may shuffle. Draw a card.

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

First strike As an additional cost to cast red permanent spells, you may pay 2 life. Those spells cost {R} less to cast if you paid life this way. This effect reduces only the amount of red mana you pay. Whenever you cast a red permanent spell, this creature deals 1 damage to any target.

Add {R}{R}{R}. Splice onto Arcane {1}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

This artifact enters tapped. {T}: Add {R}.

{1}, {T}: Add {U}{R}.

{T}: Add {C}. {1}, {T}, Sacrifice this artifact: Draw a card.

Add {R}{R}{R}{R}{R}.

This artifact enters tapped. {T}: Add {U}.

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

This creature gets +1/+0 for each artifact you control. Magecraft — Whenever you cast or copy an instant or sorcery spell, create a Treasure token.

{T}: Add {C}. {T}: Add {U} or {R}. This artifact deals 1 damage to you.

During your turn, you may cast instant and sorcery spells from your graveyard by paying 1 life in addition to their other costs. If a card or token would be put into your graveyard from anywhere, exile it instead. {1}{R}: Sacrifice this enchantment.

Until end of turn, permanents you control gain "{T}: This permanent deals 1 damage to any target."

{R}, Return this creature to its owner's hand: Add {C}{C}{R}. Activate only as a sorcery.

Magecraft — Whenever you cast or copy an instant or sorcery spell, draw a card.

(Gain the next level as a sorcery to add its ability.) Whenever you cast a noncreature spell, you may discard a card. If you do, draw a card. {2}{R}: Level 2 Noncreature spells you cast cost {1} less to cast. {2}{R}: Level 3 If a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals that much damage plus 2 instead.

Enchant creature Whenever enchanted creature deals damage to an opponent, you may draw a card.

This spell can't be countered. Flying Whenever you draw a card, Niv-Mizzet deals 1 damage to any target. Whenever a player casts an instant or sorcery spell, you draw a card.

Enchant creature Enchanted creature has "{T}: This creature deals 1 damage to target player or planeswalker. You draw a card."

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.) As long as Tandem Lookout is paired with another creature, each of those creatures has "Whenever this creature deals damage to an opponent, draw a card."

Vigilance This creature can't be blocked by creatures with power 2 or greater. Whenever this creature attacks, up to one target artifact, creature, or planeswalker an opponent controls loses all abilities until your next turn. If it's a creature, it also has base power and toughness 2/2 until your next turn.

Equipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt by this creature also causes you to gain that much life.) Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Enchant creature Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.