Counter target spell.
Basic landcycling

Split second
Counter target activated or triggered ability. If a permanent's ability is countered this way, activated abilities of that permanent can't be activated this turn. (Mana abilities can't be targeted.)

Choose one —
• Target creature gains flying until end of turn.
• Target creature becomes the creature type of your choice until end of turn.
• Look at the top four cards of your library, then put them back in any order.

Target nonland permanent's owner puts it on their choice of the top or bottom of their library.
Cycling

Up to two target creatures each get +0/+3 until end of turn. Untap those creatures. At this turn's next end of combat, tap each creature that was blocked by one of those creatures this turn and it doesn't untap during its controller's next untap step.

Target artifact or creature becomes a copy of another target artifact or creature.

Reveal the top five cards of your library and separate them into two piles. An opponent chooses one of those piles. Put a card from the chosen pile into your hand, then put all other cards revealed this way on the bottom of your library in any order.

Draw a card. You get (two energy counters).

Counter target spell that targets a permanent you control.

Return target nonland permanent to its owner's hand. Draw a card.
Adamant — If at least three blue mana was spent to cast this spell, create a Food token.

Creatures your opponents control get -2/-0 until end of turn.

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.

You may tap or untap target artifact, creature, or land.

Copy target instant or sorcery spell. You may choose new targets for the copy.

Choose one —
• Counter target spell.
• Manifest dread.

Switch target creature's power and toughness until end of turn.
Draw a card.

Choose one —
• Target creature gets -6/-0 until end of turn.
• Switch target creature's power and toughness until end of turn.
Entwine

You may tap or untap target artifact, creature, or land.
Draw a card.

Choose one or both —
• Put a base power 4 counter on target creature.
• Put a base toughness 4 counter on target creature.

Devoid
Return target nonland permanent you don't control to its owner's hand.
Whenever you cast a colorless spell with mana value 7 or greater, you may exile this card from your graveyard. When you do, return each nonland permanent you don't control to its owner's hand.

Target creature gets -4/-0 until end of turn. If you control a Fish, Octopus, Otter, Seal, Serpent, or Whale, draw a card.

Return target nonland permanent to its owner's hand. Surveil 1.

Target creature's owner puts it on their choice of the top or bottom of their library.
Surveil 1.

Creatures your opponents control get -2/-0 until end of turn.
Draw a card.

Choose target spell. If it's a creature spell, it perpetually gets -2/-0. Counter that spell unless its controller pays .

This spell costs less to cast if it targets an attacking nontoken creature.
Target creature's owner puts it on their choice of the top or bottom of their library.

Convoke
Draw three cards, then discard a card.

Return target creature to its owner's hand.
Surveil 1.

Devoid
Draw three cards and create a 0/1 colorless Eldrazi Spawn creature token with "Sacrifice this token: Add ."