Life creature spammer that spams weak immortal creatures? Such as 1/1 creatures maybe. It could cost maybe 3 aether.
Aether permanent could maybe, when activated could make you invulnerable from 5 points of damage and heal you 10HP. It could be a higher costing ability to help prevent spamming the ability with multiple cards.
Aether creature that can give other creatures a regenerate ability. Or HP growth, where every turn, the targeted creature's Max HP will increase by 1(while also increase the current health by 1)
Maybe a Life creature with an aether ability similar to mindgate, but instead will copy a random card from the opponent's hand.