Your God creatures cost 1 less to summon. They can't cost less than 1.
Instead of having this creature attack, you may tap it to use its {Tap} ability.
{Tap}: Destroy the 3 creatures [God Lupia], [Bloody Dragoon], and [Fuuma Bajir, Soul Weapon] in your battle zone. If you do, look at your shields, and you may put 1 [Death, Destruction God] into the battle zone from your deck, mana zone, hand, or shields. Then shuffle your deck.