Megarock Gigant

:The number of cards discarded from your hand for this cost is reduced by one for every five cards in your soul. When this unit is put on , [ 1 & discard four cards from your hand], and perform one of the following. ・Choose one of your units, and it gets +10000 until end of turn. ・Choose one of your units, and it cannot be hit until end of that battle.