When Rotroot Hauler enters, mill three cards, then you may put a permanent card in your graveyard on top of your library.

{B}, Sacrifice Serrated Fossil: Choose a nonland card name. Target player reveals their hand and discards a card with that name if able. Activate only as a sorcery.
Surface {3}{B}{B}. Serrated Fossil surfaces transformed.

When Minister of Utility enters, make a pledge.
{2}, Sacrifice a Clique: Make a pledge.

Trample
Whenever Aurore enters or attacks, surveil 3, then return all land cards from your graveyard to the battlefield tapped.

Once each turn, when Carefree Kappa enters or becomes the target of a spell or ability, you may create a Weather enchantment token that's all colors named Looks Like Rain with “Whenever you attack, you gain 1 life.”
Carefree Kappa gets +1/+1 for each Weather you control.

Menace
Error spells you cast cost {X} less to cast, where X is the total amount of life your opponents have lost this turn.

Level up {2}{W}
[level 1-2] Whenever you attack, target creature gets +2/+0 until end of turn.
[level 3+] Whenever you attack, target creature gets +5/+0 until end of turn.

Whenever one or more cards are put into exile from graveyards and/or the battlefield during your turn, create a 1/1 blue Bird creature token with flying.

Flying
Neotech Exploiter gets +2/+0 for each permanent you control but don't own.

Flash
Flying
When Whirring Inspector enters, target player reveals their hand. You may exile a nonland card from among them until your next turn. When you don't, exile up to one target nonland permanent that player controls until your next turn.

Add {W}{U}{B}{R}.

As an additional cost to cast this spell, sacrifice a creature.
Exile the top X cards of your library, where X is the sacrificed creature's power. Until the end of your next turn, you may play those cards.

Put target creature on top of its owner's library. Its controller surveils 1, then you surveil 1.

Counter target spell unless its controller pays {X}. If they do, create an X/X blue and black Fish creature token.

Choose up to one for each color among blue, black, and red among permanents you control.
• Create two 2/2 colorless Minion creature tokens with decayed.
• You may sacrifice a creature. If you do, draw two cards.
• Until end of turn, creatures lose all abilities.

When Mystery Egg enters, search your library for a card and exile it face down, then shuffle your library. You may look at that card as long as it remains exiled.
{G}, {T}, Sacrifice Mystery Egg: Turn the exiled card face up. You may cast that card this turn if it's a creature spell, and you may cast that spell as though it had flash.

Destroy target artifact or land.
Flashback {4}{R}{R}

Whenever you cast an instant, sorcery, or Aura spell that targets only Star-Seeking Dreamer, copy that spell for each other creature you control that the spell could target. Each copy targets a different one of those creatures.

I — Siphon the Divine gains “Creatures your opponents control lose hexproof and indestructible and can't have or gain hexproof and indestructible.”
II — Target creature you control fights up to one target creature.
III — Exile target player's graveyard.

Whenever Reborn Scuttler attacks, up to one target creature has base toughness 1 until end of turn.

Vigilance, lifelink
Ward—{2}, Pay 2 life.
Azantium, Perfect Creation has all activated abilities and triggered abilities of other artifacts you control.

Whenever this Subroutine runs, draw two cards. Creatures your opponents control get -2/-0 until your next turn.

Counter target creature spell with toughness 2 or less.

This land enters tapped.
{2}{U}{R}, {T}: Surveil 1.

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