Julliette, Roseheart Queen

Whenever you activate an ability of a creature you control that would allow an opponent to draw cards,
play a permanent from their hand, gain life, or gain
+1/+1 counters: You may pay {2} and tap Julliette,
that ability triggers again for each time your opponent
has drawn one or more cards, played or cast a
permanent without paying it's mana cost, gained life,
or gained +1/+1 counters this turn.

Partner (You can have two commanders if both have partner.)