Yuuzhan Vong Invasion

Until end of turn, creatures you control gain haste,
trample, and +X/+X, where X is the greatest
power among creatures you control.

"We called on the gods for protection, and they came
to our aid, providing us with the knowledge we
needed to convert our living resources to weapons.
We defeated the threat, and, empowered by our
victory, we gradually became conquerors of other
species and civilizations."