Mending of Stillness

A deck can only have one card named Mending
of Stillness.
When you cast Mending of Stillness, if it's the
first time you cast it this game, shuffle it into its
owner's library, then spells your opponents cast
cost {2} more to cast until your next turn.
Otherwise, tap all permanents you don't control.
Opponents can't untap more than one nonland
permanent during their untap steps.