Armorknight Cerberus (Foil)

[Act] You may put a size 1 or less «Armorknight» from your field into this monster's soul.

[Act] "Full Fire" You may discard one soul from this monster. If you do, destroy a monster on the opponent's field!

[Soulguard] (If this card would leave the field, you may discard one soul to prevent it)