so wait let me get this straight
you summon the link 4, then he summons out an omni-negater + banish from your extra deck for free while also being an abyss dweller and he's also a spell/trap negate too?
and then when the opponent summons something on their turn he can summon out another dragunity (dunno if there's anything else relevant outside of the omni-negate guy)

is that what you're telling me?
how is this not the most broken thing ever created?