Echoes of Eternity - 4 R MH3

If a triggered ability of a colorless spell you control or another colorless permanent you control triggers, that ability triggers an additional time.
Whenever you cast a colorless spell, copy it. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)

rare
Kindred Enchantment — Eldrazi
From the Magic: The Gathering set Modern Horizons 3.