Gaea's Anguish

Haste, Trample, Reach, Hexproof, Forestwalk,
Menace, Double Strike
If you roll a 1 on a die sacrifice Gaea's
Anguish. If you call a coin flip wrong,
sacrifice Gaea's Anguish.
{10}{g}{g}, {t}, Roll a 20-sided die. Creatures you
control get +X/+X until end of turn, where X is
the number rolled.