MTG

Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell. (Mana cost includes color.)

Counter target spell if it was kicked.

Discard a card: Switch Aquamoeba's power and toughness until end of turn.

Choose two target creatures controlled by the same player. Their controller chooses and sacrifices one of them. Return the other to its owner's hand.

{1}{W}{W}: Target creature you control gains protection from the color of your choice until end of turn. {1}{U}{U}: Armored Guardian gains shroud ...

Kicker—{2}{B}, Discard a creature card. (You may pay {2}{B} and discard a creature card in addition to any other costs as you cast this spell.) If...

{3}: Target player mills three cards.

Domain — Counter target spell unless its controller pays {1} for each basic land type among lands you control.

Creatures you control get +0/+1. Sacrifice Angelic Shield: Return target creature to its owner's hand.

Counter target spell. You gain 3 life.

Flying {1}{U}, {T}: Return target Kavu to its owner's hand.

Target player takes an extra turn after this one.

Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.) Flashback...

Counter target spell that targets a creature. Draw a card.

Kicker {1}{R} and/or {G} (You may pay an additional {1}{R} and/or {G} as you cast this spell.) If Cetavolver was kicked with its {1}{R} kicker, it ...

({U/P} can be paid with either {U} or 2 life.) Draw two cards, then proliferate. (Choose any number of permanents and/or players, then give each an...

Domain — Target player draws a card for each basic land type among lands they control.

At the beginning of your upkeep, if you control a red or green permanent, draw a card, then discard a card. If you control a red permanent and a gr...

{R}, {T}: Target creature gets +2/+0 until end of turn. {G}, {T}: Add one mana of any color.

Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost. Storm (When ...

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Counter target spell.

Target player draws three cards. Then that player discards two cards unless they discard a land card.

{3}: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle. {3}: Gain control of target Sliver. (This effect...