Treyhark Haulbeast

Vivid — Green/white (Spend only green and
white mana on this spell. This card is all colors
of mana spent to cast it.)
Vigilance
Whenever Treyhark Haulbeast attack or
blocks, each player chambers 3. (To chamber
3, exile the bottom three cards of your library to
the sanctum. Any player can cast spells and
play lands in the sanctum.)