The hide away

Each player loses X life, destroy X permanent
cards on the battlefield, discards X cards from
their hand, and destroys the top X cards of their
library where X is the total cost paid for this
card. You may cast X cards without paying
their mana cost discarded in this way
to the battlefield. Creatures that entered
the battlefield this way until end of turn gain
Haste, Trample and when this creature attacks
it gets +X+X for each other creature attacking.