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

Haste
Arid Outrider gets +1/+0 as long as you control a token.

Flying, vigilance
Whenever Arisen Hero attacks, if you control three or more Spirits, you gain 3 life and draw a card.

Menace
When Arrogant Cabalist enters the battlefield, if you control another Noble, each opponent loses 3 life and you gain 3 life.

Spells you cast from anywhere other than your hand can't be countered.
{1}{G/U}, {T}: Put a +1/+1 counter on target creature that doesn't have a +1/+1 counter on it. Activate only as a sorcery.

Whenever Ascended Seer attacks, it gets +1/+0 until end of turn unless defending player pays {1}.

Flying, haste
Whenever you cast a spell that targets a creature you control, you may return Ashlands Phoenix from your graveyard to your hand.

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

When Askir's Rearguard enters the battlefield, if a creature you control dealt combat damage to a player this turn, draw a card.
Wander {1}{U}

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.

Choose any number —
• Each player sacrifices an enchantment.
• Each player sacrifices an artifact.
• Each player sacrifices a creature.

When Attuned District enters the battlefield, 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.

When Avatar of Brilliance enters the battlefield, you may cast target instant or sorcery card in your graveyard with mana value X or less without paying its mana cost, where X is the number of differently named lands you control. If that spell would be put into your graveyard this turn, exile it instead.

Flying
Favored
Whenever your Champion attacks, you may double its power until end of turn. If you do, sacrifice it at the beginning of the next end step.

When Banish to the Isle enters the battlefield, exile up to one target nonland permanent you don't control until Banish to the Isle leaves the battlefield. You gain 3 life.

Up to X target creatures you control each get +1/+1 until end of turn. Untap those creatures.

Barreling Bull can't be blocked by creatures with power 2 or less.
When Barreling Bull enters the battlefield, return a creature you control to its owner's hand.

Lifelink, ward {1}
Whenever Basilo, Lion of Valor attacks, you may bless target nonenchanted creature.

Solidarity
Whenever Battlehymn Howler attacks, add an amount of {G} equal to its power. Until end of turn, you don't lose this mana as steps and phases end.

Spells you cast and abilities you activate that target equipped creature cost {2} less. This ability can't reduce the mana in that cost to less than one mana.
Equipped creature gets +1/+1 and has lifelink.
Equip {2}

Reach, haste
Drop — When Beat Devastator enters the battlefield, if you didn't cast any creature spells during your last turn, Beat Devastator gains vigilance until end of turn. Up to one target creature blocks it this turn if able.

Flying
Whenever you amp it up, create a 1/1 colorless Servo artifact creature token.

When Beguiling Stewards enters, if it's not a token, create a token that's a copy of it.
Beguiling Stewards has deathtouch as long as you control another creature named Beguiling Stewards.