Loki, Usurper Unbound

When this creature transforms into Loki, UU,
tap all creatures target opponent controls and
put a stun counter on each of them.
At the beginning of combat on your turn, you
may have any number of enthralled permanents
become creatures in addition to their other types
until end of turn. They have power and
toughness equal to the number of enthralled
permanents you control.