Bongo Bongo, Shadow Beast

When you draw a card, tap a creature an
opponent controls.
When Bongo Bongo, Shadow Beast deals combat damage to a player or a planeswalker they control,
that player can choose to sacrifice a non-land permanent. If they don't, untap Bongo Bongo,
and they lose life equal to the number of
untapped creatures you control.
{b}{b}: Regenerate Bongo Bongo, Shadow Beast.