Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

As Aquamorph Entity enters the battlefield or is turned face up, it becomes your choice of 5/1 or 1/5.

Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

{T}: Draw three cards.

{2}{U}{U}: Return Arcanis the Omnipotent to its owner’s hand.

Arc Trail deals 2 damage to any target and 1 damage to another target.

If four or more creatures are attacking, you may pay {1}{W} rather than pay this spell’s mana cost.

Arrow Volley Trap deals 5 damage divided as you choose among any number of target attacking creatures.

Banefire deals X damage to any target.

If X is 5 or more, this spell can’t be countered and the damage can’t be prevented.

When Beetleback Chief enters the battlefield, create two 1/1 red Goblin creature tokens.

As an additional cost to cast this spell, sacrifice a creature.

Destroy target creature.

Morph {U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Coral Trickster is turned face up, you may tap or untap target permanent.

Up to two target creatures each get +2/+2 until end of turn.

Unearth {B} ({B}: 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.)

Morph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Echo Tracer is turned face up, return target creature to its owner’s hand.

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

Flying

When Faerie Impostor enters the battlefield, sacrifice it unless you return another creature you control to its owner’s hand.

Flash (You may cast this spell any time you could cast an instant.)

Flying

Morph—Return two Islands you control to their owner’s hand. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

When Fathom Seer is turned face up, draw two cards.

Fiery Fall deals 5 damage to target creature.

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

When Flame-Kin Zealot enters the battlefield, creatures you control get +1/+1 and gain haste until end of turn.

Target creature gets -1/-0 until end of turn.

Draw a card.

When Fleshbag Marauder enters the battlefield, each player sacrifices a creature.