The Mysterious Masked Man

0: At the beginning of a player's turn, tap a creature you control. One of their activated or tap abilities becomes This Leader's minus ability
+1: Until your next upkeep Spirits have "Tap: Target human gets +1/+3 or +3/+1 until end of turn".
-X: X equals target activated ability's CMC or 2 for a tap ability. If it's a Human's ability, Transform This Leader. Don't change his life total