Dells Bar

When Dells bar enters the battlefield, sacrifice 3 creatures
Whenever a legendary creature dies under an opponents control, look at their hand, that player discards 1 card of your choosing. Whenever a legendary creature you control dies, remove 1 creature from exile and place it into your graveyard.
{t}{u/r}{u/r}{u/r}, pay 10 life, place 1 creature from your graveyard onto the battlefield under your control