Discombobulate

Conjure {g}(If 1 or more +1/+1 counters have been
put on a creature or a player has gained 1 or more
life this turn, this spell costs {g} less to cast.)
Change the text of target spell or permanent by replacing all instances of one nonland permanent
type with another. (For example, you may change
"return target creature" to "return target artifact."
This effect lasts indefinitely.) If this makes the
target of that spell or ability invalid, counter that
spell or ability.