Each opponent loses X life. You gain life equal to the life lost this way.

Assist (Another player can pay up to {X} of this spell's cost. You choose the value of X.) Destroy target creature with power X or less.

Destroy target creature with power X or less.

For each creature, its controller sacrifices it unless they pay X life.

Mill X cards. Target player loses 2 life for each creature card put into your graveyard this way.

Return two target creature cards from your graveyard to your hand unless any player pays {X}.

Look at twice X cards from the top of your library. Put X cards from among them into your hand and the rest into your graveyard. You lose X life.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.) Trample Heavy Power Hammer — Whenever this creature deals combat damage to a player, destroy target artifact or enchantment that player controls.

({G/P} can be paid with either {G} or 2 life.) Corrosive Gale deals X damage to each creature with flying.

Destroy target artifact or enchantment with mana value X. It can't be regenerated. You gain X life.

Target creature you control deals damage equal to its power to each of X target creatures and/or planeswalkers.

Tropical Storm deals X damage to each creature with flying and 1 additional damage to each blue creature.

Prevent the next X damage that would be dealt to you this turn. Draw a card.

Tap X target creatures. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Hail of Arrows deals X damage divided as you choose among any number of target attacking creatures.

Prevent the next X damage that would be dealt to target creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.

You gain X plus 3 life.

This creature enters with X +1/+1 counters on it. Coven — At the beginning of your end step, if you control three or more creatures with different powers, put a +1/+1 counter on target creature you control.

This creature enters with X +1/+1 counters on it. {3}: Put a +1/+1 counter on this creature. Any player may activate this ability.

This creature enters with X +1/+1 counters on it.

This creature enters with X +1/+1 counters on it. {1}{G}: Regenerate this creature.

Put X +1/+1 counters on target artifact you control. If it isn't a creature or Vehicle, it becomes a 0/0 Construct artifact creature.

Bestow {X}{G}{G} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Reach, trample This permanent enters with X +1/+1 counters on it. Enchanted creature gets +1/+1 for each +1/+1 counter on this Aura and has reach and trample.

This creature enters with X +1/+1 counters on it. Whenever one or more +1/+1 counters are put on another non-Hydra creature you control, put a +1/+1 counter on this creature.

Cast this spell only during the declare blockers step. X target attacking creatures become blocked. Choking Vines deals 1 damage to each of those creatures. (This spell works on creatures that can't be blocked.)

Prevent all combat damage X target creatures would deal this turn.

Create X X/X green Ooze creature tokens.

Target creature gets +X/+X until end of turn. Create a 1/1 green and white Citizen creature token.

Creatures of the creature type of your choice get +X/+X until end of turn.

Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it.

This spell costs {3} less to cast if it targets a creature whose controller has eight or more cards in their graveyard. Gain control of target creature with mana value X.

Flying This creature enters with X +1/+1 counters on it.

X target creatures can't be blocked this turn. Until end of turn, those creatures gain "Whenever this creature deals combat damage to a player, draw a card."

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Choose one — • Tap X target permanents. • Untap X target permanents.

Put X +1/+1 counters on target creature you control. Then counter up to one target spell unless its controller pays mana equal to the greatest power among creatures you control.