Despair, Vordor's steed

Trample, flanking
Mount (another creature can 'equip' this one and fuse with this one, their power and toughness combine and they share their abilities and card traits. if a mounted creature gets destroyed, only destroy the mount.)
When Despair, Vordor's steed enters the battlefield, target player puts the top five cards from their library in their graveyard, you may put any creature cards on the battlefield under your control this way.