Realitystone

Infinity Stones cannot be Destroyed or Exiled
When all six Infinity stones are placed search your library or graveyard for Thanos the Mad Titan
{t}{r}{r}{r} Change the power of a target creature for a turn (this ability can be used when ever)
{t}{x} How ever many mana you tap lower target creatures toughness (this ability can only be used twice)
"Balanced as all thing should be" - Thanos