If combat damage would be dealt to Gloom Surgeon, prevent that damage and exile that many cards from the top of your library.

Whenever you cast a multicolored spell, Gloryscale Viashino gets +3/+3 until end of turn.

Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)
Tap target creature. It doesn't untap during its controller's next untap step.
Draw a card.

Halimar Depths enters the battlefield tapped.
When Halimar Depths enters the battlefield, look at the top three cards of your library, then put them back in any order.
: Add .

Equipped creature has vigilance, trample, and haste.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

, : Target opponent mills a card, then repeats this process until a creature card or X cards have been put into their graveyard this way, whichever comes first. If one or more creature cards were put into that graveyard this way, sacrifice Helm of Obedience and put one of them onto the battlefield under your control. X can't be 0.

Heroes' Bane enters the battlefield with four +1/+1 counters on it.
: Put X +1/+1 counters on Heroes' Bane, where X is its power.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Prevent all combat damage that would be dealt this turn.

Return target artifact, enchantment, or land to its owner's hand.

Flying, haste
You may cast sorcery spells as though they had flash. (You may cast them any time you could cast an instant.)

Search your library for a card and put that card into your hand. If this spell was cast from a graveyard, instead search your library for two cards and put those cards into your hand. Then shuffle your library.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target player reveals their hand. You choose a nonland card from it with converted mana cost 3 or less. That player discards that card.

Imprint — When Invader Parasite enters the battlefield, exile target land.
Whenever a land with the same name as the exiled card enters the battlefield under an opponent's control, Invader Parasite deals 2 damage to that player.

Whenever Joraga Bard or another Ally enters the battlefield under your control, you may have Ally creatures you control gain vigilance until end of turn.

Whenever you gain life, put two +1/+1 counters on Karlov of the Ghost Council.
, Remove six +1/+1 counters from Karlov of the Ghost Council: Exile target creature.

Whenever Kiln Walker attacks, it gets +3/+0 until end of turn.

: Regenerate Kin-Tree Warden.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Deathtouch
, Remove a +1/+1 counter from a creature you control: Target creature gets -1/-1 until end of turn.