Gathering Legions

At the beginning of your combat phase, if you
control 7 or more creatures each player reveals
their hand and the top 7 cards of their library
and puts any creatures revealed this way into
play. All creatures in play gain haste until end of
turn. Search your library, hand and graveyard for
a card named Final Battle and put it directly into
play without paying its mana cost.
The time has come. Ready the armies for battle!