Borrelcode Dragon

Flying, Indestructible so long as you control another monster with “Borrel” in its name.

As this creature enters, sacrifice it unless you sacrifice 3 monsters. If you do, make this creature’s base toughness 5 and give it haste.

When this creature attacks, you may pay {u}{4}, and if you do, destroy all creatures target opponent controls.
You may pay 2 and exile this creature from your graveyard, put 1 other creature with 0 toughness from your exile onto the battlefield.