When this creature enters, mill three cards, then you may exile an instant, sorcery, or Subroutine card from your graveyard. You may cast a copy of that card. If you don't, cache it.

When Arduous Miners enters, you may have all players discard a card.
Whenever one or more cards leave your graveyard, create a tapped Treasure token.

Inspired — Whenever Argus's Elite becomes untapped, creatures you control get +1/+0 until end of turn.

Army Reserves enters with X +1/+1 counters and a defender counter on it.
{1}: Move a counter from Army Reserves onto another target creature. Activate only as a sorcery.

Enchant creature
Enchanted creature loses all abilities and is a white Peasant with base power and toughness 1/1 named Penitent Prisoner.
When enchanted creature leaves the battlefield, you may draw a card.

When As'Ahai's Final Front enters, you draw a card and gain 2 life.
[f] — Until your next turn, you may cast spells as though they had flash.
[f] — Until your next turn, noncreature spells your opponents cast cost {2} more to cast.

Ashen-Wing Avenger can't block.
Whenever one or more creatures with a -1/-1 counter on them attack or block, target opponent loses 1 life and you gain 1 life.
Persist

As an additional cost to cast artifact spells, you may pay {2}. When you do, each opponent sacrifices an untapped creature.

Deathtouch
If an opponent would lose life, they lose that much life plus 1 instead.
Spellcharge 3

Create a tapped 2/1 red Human Warrior creature token.
Flashback {2}{R}

Whenever another creature you control enters, put a first strike counter on Aspiring Hero if that creature has first strike and Aspiring Hero doesn't. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, trample, vigilance, and ward.

Target creature gets +2/+0 until end of turn and must be blocked this turn if able.

Choose target creature you control. When that creature leaves the battlefield this turn, choose one —
• Create a token that's a copy of it.
• Search your library for a creature card with lesser mana value, put it onto the battlefield, then shuffle.

Create two 1/1 red Soldier creature tokens.
Revolt — If a permanent you controlled left the battlefield this turn, those tokens get +1/+1 and gain haste until end of turn.

Choose a creature type. Put a +1/+1 counter on each creature you control of the chosen type.
If you control two or more creatures that share a name, draw a card.

Exile the top X cards of your library. Until the end of your next turn, you may play cards exiled this way.
At the Walls deals X damage to each creature.

Face-down spells you cast cost {1} less to cast.
Face-down creatures you control get +1/+1.

Whenever you cast a spell during combat, remove up to one target attacking creature from combat. You may untap that creature.

When this creature enters, create a 4/4 colorless Vehicle artifact token named Hardsuit with crew 3.
Artifact tokens and enchantment tokens you control have exalted.

When Attuned District enters, scry 2.
Whenever you scry, you may pay {1}. If you do, create a 0/0 colorless Construct artifact creature token, then put X +1/+1 counters on it, where X is the number of cards you looked at.

Whenever another nontoken creature you control dies, you may mill a card. If you're ancient, instead you may draw a card.

Aunglade Fox can't be blocked by creatures with power 2 or less.

Vigilance

At the beginning of your end step, put a +1/+1 counter on each creature you control that entered this turn.
{2}, Sacrifice Auroric Guidance: You gain life equal to the number of creatures you control.

{2}, {T}: Surveil 1.
{3}, {T}, Sacrifice Auroric Waygate: Return target card from your graveyard to your hand.