Whenever you attack, put a +1/+1 counter on a creature you control.

Enchant creature
When Collector's Item enters, surveil 2.
Enchanted creature loses all abilities and is a colorless Sculpture creature with base power and toughness 0/2.

Counter target activated ability from a nonland source.
Draw a card.

When Contest Coordinator enters, look at the top five cards of your library. You may reveal a Plains card or a nonland card with an activated ability from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

{T}, Tap another untapped creature you control: You may tap or untap another target creature.
Whenever Contest Star becomes untapped, draw a card.

Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card until the end of your next turn.
{1}{R}, Sacrifice Crumbling Tower: It deals damage equal to the number of cards exiled with it to target player.

Return target permanent card with an activated ability from your graveyard to the battlefield. You may activate its abilities this turn as though it had haste.

Flying
{1}, {T}: Draw a card, then discard a card.
Whenever one or more creatures you control deal combat damage to a player, untap Delivery Gull.

Depths Ancient's power and toughness are each equal to the number of cards in your graveyard plus the number of exiled cards you own with surface.
Surface {5}{B}{B}

When Desolate Lands enters and whenever you cast a spell, it deals 3 damage to target opponent unless they sacrifice a permanent.

Whenever Devourer of Fortunes enters or attacks, return up to one target instant or sorcery card in a graveyard or creature on the battlefield to its owner's hand. You may cast a copy of it, and may spend mana of any type to cast it.

When Diamond Dust enters and whenever you cast a spell, put a +1/+1 counter on each creature you control.

Target creature gets +2/+0 and gains first strike until end of turn. If it's a Dragon, put a +1/+1 counter on it.

Flying
Amity — Whenever you attack with Dustwing Butterfly and exactly one other creature, create a tapped and attacking token that's a copy of target creature you control, except it's 1/1 and isn't legendary. Sacrifice that token at the beginning of the next end step.

Flying
Amity — Whenever you attack with Dustwing Moth and exactly one other creature, Dustwing Moth deals 2 damage to any target.

Flying
Amity — Whenever you attack with Earthbreaker Dragon and exactly one other creature, Earthbreaker Dragon deals 1 damage to each of up to two target creatures without flying.

Legendary permanents you control have “{1}, {T}: Tap target creature.”
At the beginning of each end step, scry 1 if you spent {U} to activate abilities this turn, Ema deals 1 damage to each opponent if you spent {R}, and put a +1/+1 counter on a creature you control if you spent {W}.

This spell can't be countered.
First strike, haste
Whenever an opponent casts a spell during your turn, End of Mutations deals 5 damage to them.

{G}, Sacrifice Entangled Fossil: Target card in your graveyard gains surface until end of turn. The surface cost is equal to its mana cost.
Surface {4}{G}{G}. Entangled Fossil surfaces transformed.

{1}{R}: Erupting Volcamel and up to one other target creature you control get +2/+0 until end of turn.
Whenever you activate a nonmana ability, if you've spent at least six mana to activate nonmana abilities this turn, Erupting Volcamel deals 2 damage to any target.

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

{3}{R}: Exile the top card of your library. You may play that card until the end of your next turn.
{7}{R}: Exotic Transformer deals damage equal to its power to any target.

Draw three cards.
Surface {5}{U}{U}

Ward {2}
Spells and abilities you control that target Fabulous Serpent cost {2} less.
{2}{U}: Creatures you control get +1/+1 until end of turn.

When Falling Ashes enters, exile up to two target cards from graveyards, then you gain 2 life.