Boros Reckoner, Stuffy Doll, Repercussion (careful with that one), Spiteful Sliver, Wrathful Red Dragon, Pariah, Pariahs Shield, as well as Dictate of the Twin Gods and other backup doubling effects
After the attack on Reactor 5, Cloud is separated from the party in Sector 6 and only returns to Sector 7 right before the slums are destroyed by the evil Shinra dropping the upper plate of the city on top of it
Keep in mind that you'll need to allow Mistplay to access your playtime and function in the background
when they only have 1 creature because you have already removed the rest
Persist Persist is close to being an all-timer reanimation spell at 2 mana, but the -1/-1 counter matters and targeting only non-legendaries severely limits the types of targets you'd want to bring back