Creatures can't attack you unless their controller pays for each creature they control that's attacking you.

Shadow (This creature can block or be blocked by only creatures with shadow.)
You may choose not to untap this creature during your untap step.
Whenever this creature deals damage to an opponent, tap target creature. That creature doesn't untap during its controller's untap step for as long as this creature remains tapped.

, : You may tap or untap target creature.

Shadow (This creature can block or be blocked by only creatures with shadow.)
: This creature gets +1/+0 until end of turn.

Shadow (This creature can block or be blocked by only creatures with shadow.)
: This creature gets +1/+0 until end of turn.

Destroy two target nonblack creatures. You lose 5 life.

All Slivers have ", Sacrifice this permanent: Target player discards a card at random. Activate only as a sorcery."

All Sliver creatures have ": This creature gets +0/+1 until end of turn."

As an additional cost to cast this spell, sacrifice a land.
Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

: Destroy target creature blocking this creature.

Destroy target artifact.

Sudden Impact deals damage to target player equal to the number of cards in that player's hand.

Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever this creature attacks and isn't blocked, you may sacrifice it. If you do, defending player discards three cards.

Flying
Whenever this creature becomes the target of a spell or ability, this creature gets +0/+3 until end of turn.

Flying
: This creature gets +1/+0 until end of turn.

Tap an untapped creature you control: This creature gains flying until end of turn.

: Target creature blocks this creature this turn if able.

Destroy all Islands.

Counter target spell.
Draw a card.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Whenever this creature attacks, it doesn't untap during its controller's next untap step.

Pay 3 life: Put a +1/+1 counter on this creature.

Black creatures can't attack or block.

Target player reveals their hand, then you choose a card other than a basic land card from it. Search that player's graveyard, hand, and library for all cards with the same name as the chosen card and exile them. Then that player shuffles.

Flying

Flying
: Regenerate this creature.

Flying
Whenever this creature blocks or becomes blocked by a creature, that creature gets +1/+1 until end of turn.

Exchange control of target artifact or creature and another target permanent that shares one of those types with it. (This effect lasts indefinitely.)

When this creature enters, flip a coin. If you lose the flip, return this creature to its owner's hand.

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

When this creature enters, you gain 4 life.

: This creature deals 1 damage to target creature blocking it.

This creature can't be blocked by more than one creature.

First strike
Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.

Flying
Discard a creature card: This creature gets +2/+2 until end of turn.

Whenever this creature becomes the target of a spell or ability, put a -1/-1 counter on it.