Temple of Origins enters tapped unless you control two or fewer other lands.
As Temple of Origins enters, choose two colors.
{T}: Add one mana of one of the chosen colors.
If you would add mana of a color that wasn't chosen, add {C} instead.

{T}: Add {C}.
{T}: Add one mana of any color. If you don't control a Weather, spend this mana only to cast a Weather spell.

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.

When Gone Pickin' enters, exile up to one target nonland permanent an opponent controls until Gone Pickin' leaves the battlefield. Then create a Berry token. You may attach it to a creature you control.

Flying
When Stratus Fledgling enters, it acclimates.
Weather spells you cast cost {1} less to cast.

This spell costs {1} less to cast if there is a card named Avert Disaster or Imminent Disaster in your graveyard.
Counter target spell.

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

Golems you control have ward {1}.
Unspeaking Titan can't attack or block unless you control three or more Golems.
Whenever Unspeaking Titan enters or attacks, tap up to one target creature and put a stun counter on it.
{3}, {T}: Create a 1/1 white Golem creature token.

Flying, haste
Landfall — Whenever a land you control enters, put a +1/+1 counter on Pressuring Ghoul unless any opponent discards a card.

Flying
Surface {2}{B}{B}. This spell costs {1}{B}{B} less if you control a creature named Relentless Bats.
A deck can have any number of cards named Relentless Bats.

{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.

Ward—Discard a card.
Whenever Reborn Fisher attacks, choose a nonland card name, then defending player reveals their hand and discards a card with that name if able.

When Smiling Sludge enters, create a Berry token.
Whenever you sacrifice a nonland permanent, target opponent loses 1 life and you gain 1 life.

Golems you control have menace.
Unyielding Titan can't attack or block unless you control three or more Golems.
Whenever Unyielding Titan enters or attacks, target opponent reveals their hand. Exile a card from their hand or graveyard.
{3}, {T}: Create a 1/1 white Golem creature token.

Haste
{T}, Discard a card: Put a +1/+1 counter on another target creature you control and untap it. It gains haste until end of turn. Activate only as a sorcery.

This spell can't be countered.
First strike, haste
Whenever an opponent casts a spell during your turn, End of Mutations deals 5 damage to them.

Haste
Amity — Whenever you attack with Solid Smog and exactly one other creature, you may pay {R}. If you do, transform Solid Smog.

Menace
Amity — Whenever you attack with Splitting Smog and exactly one other creature, you may pay {1}{R}. If you do, attacking creatures you control get +2/+0 until end of turn.

Amity — Whenever you attack with Temperamental Chick and exactly one other creature, Temperamental Chick deals 1 damage to up to one target creature. When Temperamental Chick deals combat damage to a player this combat, you may transform it.

First strike
Amity — Whenever Tempered Fowl attacks, it deals 1 damage to up to one target creature. It can't block this turn. If exactly one other creature attacked with it, this ability triggers three times instead.

When Berry Fermenter enters, create a Berry token.
{2}, Sacrifice a Berry: You gain 3 life.
{T}, Sacrifice a Berry: Add one mana of any color.

Amity — Whenever you attack with Growing Gecko and exactly one other creature, they both get +1/+1 until end of turn. When Growing Gecko deals combat damage to a player this combat, you may transform it.

Trample
Amity — Whenever Old-Growth Gecko attacks, put a +1/+1 counter on another creature you control. If exactly one other creature attacked with it, this ability triggers three times instead.

When Hungry Blob enters, destroy up to three target artifacts and/or enchantments with total mana value 3 or less.

{T}: Add one mana of any color.
Amity — Whenever you attack with Sunsoaker and exactly one other creature, put a +1/+1 counter on Sunsoaker and add one mana of any color. Until end of turn, you don't lose that mana as steps and phases end.