Bum-Bo

: If you would gain mana, instead add that many loyalty counters to Bum-Bo. Activate Bum-Bo’s loyalty abilities any time you could play an instant.
-6: You get an emblem with “Creatures you control get +1/+1.” Then, you may sacrifice Bum-Bo.
-20: Sacrifice Bum-Bo. You get an emblem with “Creatures you control have vigilance. There is an additional combat phase on your turn.”