Genetics Prodigy enters with a +1/+1 counter, a flying counter, and a vigilance counter on it.
Whenever Genetics Prodigy attacks, you may remove a counter from it. If you do, draw a card.

Trample
When Seismic Chimera enters, bless target creature.

This spell has lifelink as long as you control a creature with lifelink.
Retaliatory Outburst deals 4 damage to target tapped creature.

When Primordial Seas enters and whenever you cast a spell, create a token that's a copy of another target permanent you control.

{T}: Add {C}.
{4}, {T}, Sacrifice Timeworn Crags: Destroy target nonbasic land. This ability costs {1} less to activate for each nonbasic land you don't control.

Choose one. If your devotion to green is three or greater, you may choose another. The same is true for devotion to black.
• Create a 1/1 black Snake creature token with deathtouch.
• Creatures you control gain indestructible until end of turn.
• Prevent all damage that would be dealt to you this turn.

Deathtouch
When this creature transforms into Iris Flayer, target player draws a card and loses 1 life.

Vigilance
Whenever you attack, bless target creature.

Flash
At the beginning of your end step, if you've cast no spells this turn, you may draw a card, then discard a card.

Choose one —
• Elektes's Charge deals 2 damage to each nonenchantment creature.
• Up to two target creatures you control each get +2/+0 and gain trample until end of turn.

This spell costs {2} less to cast if the creature you control it targets has power 4 or greater.
Put a +1/+1 counter on target creature you control. It deals damage to another target creature equal to its power.

When this creature enters, put a +1/+1 counter on each of up to two target creatures you control.
Forestcycling {2}

Enchant creature
Whenever enchanted creature deals or is dealt damage, exile it.

Put a +1/+1 counter on each creature you control.
Cycling {1}{G}
When you cycle this card, put a +1/+1 counter on target creature you control.

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.

Gates to the Underworld enters tapped.
{T}: Add {W} or {B}.
{5}{W/B}: Gates to the Underworld becomes a 3/4 white and black Construct creature with lifelink until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to white and black. Activate only once each turn.

Vigilance, reach
When Thundering Serpent enters, you gain 6 life.

This spell costs {1} less to cast for each creature you control.
Trample
When this creature enters, you may discard a card. If you do, draw two cards.

Surface {3}{G}{G}
Buried Geode surfaces with a +1/+1 counter.

Vigilance
{T}: Add {C}.
{T}: Add {C}{C}. Activate only if Steadfast Gatekeepers is a creature.
Spellcharge 3

Deathtouch
When Phyto's Offshoot enters, you may exile any number of permanent cards from your graveyard. When you do, target opponent reveals that many cards from their hand. You choose one of them. That player discards that card.

When Together in Arms enters, create two 1/1 colorless Soldier creature tokens.
You controlled a spell that targeted a creature you controlled this turn.
You controlled an ability that targeted a creature you controlled this turn.

[+1]: Crux deals 1 damage to target player or planeswalker. Put a chain counter on up to one target artifact or nonbasic land. It loses all abilities except mana abilities as long as it has a chain counter on it.
[–2]: Discard a card. When you do, Crux deals damage equal to the discarded card's mana value to up to one target creature and you draw a card.
[–6]: Exile target red instant or sorcery card from your graveyard. Add {R}{R}{R}, then you get an emblem with “You may cast copies of the exiled card.”

Whenever you cast an instant or sorcery spell from your hand, cache it instead of putting it into your graveyard as it resolves.

Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
At the beginning of each end step, each opponent mills X cards, where X is the number of cards put into their graveyard from anywhere this turn. You gain life equal to the number of cards milled this way.