Bahamut

This spell can't be countered
Trample, Double Strike, Flying, Haste,
Annihilator 5, Ward 2
As an additional cost to cast this
spell, you may sacrifice any number of dragon creatures. This spell costs {1} less to caste for each
non-token creature sacrificed this way.
When Bahamut enters the battlefield, deal {x} damage to each creature for each Dragon
creature that died this turn.