Kelsias Primal Elder

Flying
Pay {x}{r}{u}{w} destroy all creatures. all players,
gain 2X life, where X is the amount of Mana
each player controls.
Exile Kelsius Primal Elder swap your hand with
your graveyard. If you casted 2 or more dragon
spells this turn, put Kelsias primal Elder into
your graveyard instead.