Omniscience Dragon, Sebchet-avil

-Opponent Turn's Guard Step-[Discard a card with [Heal] from your hand], and call this card to your from face down. :When this unit is put on , 1, discard the top card of your deck, and perform one of the effects below depending on that card's type. ・Normal Unit ‐ This unit gets +20000 until end of that battle. ・Trigger Unit ‐ Choose one of your units, and it cannot be hit until end of that battle.