Avatar's Reunion

This Spell can't be countered.
Search in your library, graveyard and exile any
number of Avatar of Terra creatures, put them
into the battlefield under your control then
shuffle your library. Until end of turn, all Avatar
of Terra creatures gain Haste and Indestructible.
Exile Avatar's Reunion. At the end of turn exile
all Avatar of Terra creatures.
"They can rebuild worlds, or destroy them."