Even though most of these cards have game-changing effects as soon as they drop, if you manage to live a turn, Red Roc was a great out
4 Realmbreaker, The Invasion Tree Realmbreaker, the Invasion Tree is a legendary and exciting Phyrexian artifact card that has two villainous effects that can take over a game
Void Maw Void Maw is a bizarre creature that can put cards that were exiled by it back into its owners graveyard
Cosima does not live with the rest of the gods, but she comes back occasionally and is welcome to stay in the Gods' Hall as long as she likes
Finally, you can choose one of the following once per turn: if this card is special summoned, target one card your opponent controls and banish it, or when this card destroys an opponent's monster, you can make this card gain 1,500 attack
In terms of supportive Spell/Traps, Spirits lack efficient consistency Spell/Traps, and mostly have obsolete battle-focused Spell/Traps or conditional card effects that remove their self-return effects