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Commander
If you would lose unspent mana, that mana becomes black instead. At the beginning of your first main phase, look at the top card of your library. You may reveal that card if it has three or more colored mana symbols in its mana cost. If you do, add three mana in any combination of its colors and put it into your hand. If you don't reveal it, put it into your hand.

Commander
Infect
Menace, toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When Vishgraz enters, create three 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This token can't block." Vishgraz gets +1/+1 for each poison counter your opponents have.

Infect
Protection
Choose one. If you control a commander as you cast this spell, you may choose both instead. • Creatures you control gain flying, vigilance, and double strike until end of turn. • Creatures you control gain lifelink, indestructible, and protection from each color until end of turn.

Protection
Copy
Copy
Land
{T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a legendary spell. {T}: Add one mana of any color among legendary permanents you control. {3}, {T}, Exile this land: Target legendary creature gains hexproof and indestructible until end of turn.

Land
Ramp
Whenever you cast a creature spell with mana value 4 or greater, you draw a card, gain 1 life, and put a +1/+1 counter on Helga. {T}: Add X mana of any one color, where X is Helga's power. Spend this mana only to cast creature spells with mana value 4 or greater or creature spells with {X} in their mana costs.

Hideaway 5 (When this enchantment enters, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.) Whenever you cast a multicolored spell, create a Treasure token. Then you may pay {W}{U}{B}{R}{G}. If you do, you may play the exiled card without paying its mana cost.

Ramp
Counters
When Kellan Joins Up enters, you may exile a nonland card with mana value 3 or less from your hand. If you do, it becomes plotted. (You may cast it as a sorcery on a later turn without paying its mana cost.) Whenever a legendary creature you control enters, put a +1/+1 counter on each creature you control.

Counters
Recursion
Recursion
Draw
Flying, vigilance, deathtouch, lifelink When Atraxa enters, reveal the top ten cards of your library. For each card type, you may put a card of that type from among the revealed cards into your hand. Put the rest on the bottom of your library in a random order. (Artifact, battle, creature, enchantment, instant, land, planeswalker, and sorcery are card types.)

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) You may look at the top card of your library any time. You may cast noncreature spells from the top of your library. If you cast a spell this way, you may cast it as though it had flash.

When this enchantment enters, if you control a creature with power 4 or greater, draw a card. Creatures you control have trample. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.) Whenever a creature you control with power 4 or greater enters, draw a card.

Flying, vigilance, toxic 2 Corrupted — At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells.

Legendary creatures you control get +X/+X, where X is the number of legendary creatures you control. Whenever you cast a legendary spell from your hand, exile cards from the top of your library until you exile a legendary nonland card with lesser mana value. You may cast that card without paying its mana cost. Put the rest on the bottom of your library in a random order.

Trample Whenever this creature deals combat damage to a player, look at the top card of your library. You may play a land from the top of your library or cast a spell with mana value less than or equal to the damage dealt from the top of your library without paying its mana cost. If you don't, put that card into your hand. Blitz {2}{B}{R}{G}

Draw
Proliferate
Choose three. You may choose the same mode more than once. • Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) • Target creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.) • Counter target activated or triggered ability.

Proliferate
Removal
Choose one — • Target opponent sacrifices a creature or planeswalker they control with the highest mana value among creatures and planeswalkers they control. • Exile the top three cards of your library. Until your next end step, you may play those cards. • Exile target player's graveyard.

Removal
Sideboard
Companion — No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) {T}: Add {W}{U}{B}{R}{G}. This mana can't be spent to pay generic mana costs.

Sideboard
Maybeboard
Whenever you cast a white spell, create a 1/1 white Human Soldier creature token. Whenever you cast a blue spell, scry 2. Whenever you cast a red spell, Aragorn deals 3 damage to target opponent. Whenever you cast a green spell, target creature gets +4/+4 until end of turn.

Flying, trample Falco Spara enters with a shield counter on it. You may look at the top card of your library any time. You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs.

Choose three. You may choose the same mode more than once. • Until end of turn, target creature loses all abilities and has base power and toughness 1/1. • Target creature connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.) • Target player returns a creature card from their graveyard to their hand.

If this creature would enter and it wasn't cast or no mana was spent to cast it, exile it instead. Vigilance, trample, lifelink When this creature leaves the battlefield, exile the top ten cards of your library. You may cast any number of spells with total mana value 10 or less from among them without paying their mana costs.

Whenever you cast your first spell during each of your turns, exile the top card of target opponent's library and create a Treasure token. Then you may cast the exiled card without paying its mana cost if it's a spell with mana value less than the number of artifacts you control. If you don't cast it this way, you may cast it this turn.
