Each player sacrifices all permanents they control that are one or more colors.
{G}{U}{R}
Animar, Soul of Elements
Legendary Creature - Elemental
Protection from white and from black
Whenever you cast a creature spell, put a +1/+1 counter on Animar, Soul of Elements.
Creature spells you cast cost {1} less to cast for each +1/+1 counter on Animar.
1 /
1
{2}{G}{G}
Beast Whisperer
Creature - Elf Druid
Whenever you cast a creature spell, draw a card.
2 /
3
{2}{G}
Beast Within
Instant
Destroy target permanent. Its controller creates a 3/3 green Beast creature token.
{2}{R}
Chaos Warp
Instant
The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.
--
Forest
Basic Land - Forest
({T}: Add {G}.)
{U}
Pongify
Instant
Destroy target creature. It can't be regenerated. Its controller creates a 3/3 green Ape creature token.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{10}
Ulamog, the Ceaseless Hunger
Legendary Creature - Eldrazi
When you cast this spell, exile two target permanents.
Indestructible
Whenever Ulamog, the Ceaseless Hunger attacks, defending player exiles the top twenty cards of their library.