All Sliver creatures get +2/+0.

Flying

Brass Gnat doesn’t untap during your untap step.

At the beginning of your upkeep, you may pay {1}. If you do, untap Brass Gnat.

Morph {5}{U}{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 Brine Elemental is turned face up, each opponent skips their next untap step.

{T}: Add {C}.

{1}, {T}: Put a storage counter on Calciform Pools.

{1}, Remove X storage counters from Calciform Pools: Add X mana in any combination of {W} and/or {U}.

Return target black creature card from your graveyard to your hand.

Madness {0} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Counter target spell.

{4}, {T}: Reveal the top card of your library. If it has the same name as a card in your graveyard, put it into your graveyard. Otherwise, draw a card.

Target player draws four cards, then discards three cards. If you cast this spell during your main phase, instead that player draws four cards, then discards two cards.

Flying

As long as Castle Raptors is untapped, it gets +0/+2.

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)

Other creatures you control with flanking have flanking. (Each instance of flanking triggers separately.)

Flash

Split second (As long as this spell is on the stack, players can’t cast spells or activate abilities that aren’t mana abilities.)

Flying

Other white creatures get +1/+1.

Prevent all damage that creatures would deal to players this turn.

Sacrifice Children of Korlis: You gain life equal to the life you’ve lost this turn. (Damage causes loss of life.)

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color.

When Chromatic Star is put into a graveyard from the battlefield, draw a card.

{T}: Add {U}.

{1}{U}: Chronatog Totem becomes a 1/2 blue Atog artifact creature until end of turn.

{0}: Chronatog Totem gets +3/+3 until end of turn. You skip your next turn. Activate only once each turn and only if Chronatog Totem is a creature.

{1}{W}: Return Chronosavant from your graveyard to the battlefield tapped. You skip your next turn.

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)

Choose a counter on target permanent or suspended card. Remove that counter from that permanent or card or put another of those counters on it.

Clockwork Hydra enters the battlefield with four +1/+1 counters on it.

Whenever Clockwork Hydra attacks or blocks, remove a +1/+1 counter from it. If you do, Clockwork Hydra deals 1 damage to any target.

{T}: Put a +1/+1 counter on Clockwork Hydra.

Flying

When Cloudchaser Kestrel enters the battlefield, destroy target enchantment.

{W}: Target permanent becomes white until end of turn.

When Coal Stoker enters the battlefield, if you cast it from your hand, add {R}{R}{R}.