As an additional cost to cast this spell, tap four untapped artifacts and/or lands you control.
{T}: Each opponent loses 1 life and you gain 1 life.
Tap four untapped artifacts and/or lands you control: Untap Altar of Chrome.

Amity — Whenever you attack with Amateur Tamer and exactly one other creature, put a +1/+1 counter on target creature.

Once each turn, when you activate a nonmana ability, you may put a counter on Amber that it doesn't already have from among +1/+1, first strike, haste, lifelink, menace, and vigilance.
{R}, {T}: You may discard a card. If you do, draw a card.

When Ambient Illuminator dies, if you've scried this turn, you gain 3 life and draw a card.

Vigilance, reach, trample, ward {3}
Ancient Cloudgrazer enters with X +1/+1 counters on it.

Whenever Ancient Conscriptor becomes spellcharged, gain control of target creature you don't control until end of turn. Untap it. It gains haste until end of turn.
Spellcharge 4

Flying
Whenever you amp it up, Android Stunner deals 1 damage to any target. If a permanent was dealt damage this way, tap it and put a stun counter on it.

Whenever Anesthesiologist attacks, teach Anesthesiologist lifelink if you control a white permanent. Otherwise, you gain 2 life.

Flying
When Anvilwrought Crane dies, create a Weapon token.

Whenever you cast a spell that targets Anvilwrought Lion, creatures you control get +1/+0 until end of turn.

Menace
Whenever Aphonai's Reveler attacks, defending player mills two cards. Then if that player has eight or more cards in their graveyard, Aphonai's Reveler gets +2/+1 and gains lifelink until end of turn.

Favored
Whenever your Champion deals combat damage to a player, create that many Treasure tokens.

{T}: Draw a card, then discard a card.
Once each turn, when you cast a spell from your graveyard, you may create a 2/1 blue Human Pirate creature token.
Crew 2

When Aqua Gang Diver enters, surveil 3.
Spells you cast from your graveyard cost {1} less to cast.

Flying
Whenever Aqueous Drake deals combat damage to a player, scry 1.

Enchant creature
Enchanted creature gets +3/+3 and has reach.

Reach
If a creature you control would deal combat damage to a permanent or player, you may have it deal damage equal to your devotion to green instead.

Sacrifice Archaeovolcanologist: Choose an instant, sorcery, or land card in your graveyard. You may play that card this turn.

Archaic Obelisk enters with a charge counter on it.
{T}: Mill two cards, then you may remove a charge counter from Archaic Obelisk. If you do, return a card milled this way to your hand.

Menace
Spellcharge 3
You may cast Archaic Straggler from your graveyard if you've spent at least three mana to cast spells this turn.

Flying
When Archon of Condemnation enters, you may bless target creature.
At the beginning of your upkeep, you may sacrifice a creature. If you do, bless target creature.

Flying, vigilance, lifelink

Flying
Favored
Whenever your Champion attacks, create a 0/0 white Army creature token, then put a +1/+1 counter on each Army you control.

Menace
When Ardent Voter enters, make a pledge.