Terisian Mindbreaker [The Brothers' War Prerelease Promos] Phyrexian Human Artificer " It transforms into Dark

" It transforms into Dark Confidant

you play it this turn

Urza's Battlethopter's power

At the beginning of your ned step

Terisian Mindbreaker [The Brothers' War Prerelease Promos] Phyrexian Human Artificer " It transforms into DarkSet: The Brothers' War Prerelease Promos Type: Artifact Creature Juggernaut Rarity: Rare Cost: {7} Whenever Terisian Mindbreaker attacks, defending player mills half their library, rounded up. Unearth {1}{U}{U}{U} ({1}{U}{U}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)