Takvir, the oddball wrangler

Insect creature tokens you control have Saddle 2
(Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Whenever a creature you control attacks while
saddled, mill cards equal to its power. If you do,
you may pay {u}{b}{g} and return a card from your
graveyard to your hand.