avatar the last airbender mtg best cards Avatar: Foil: Team Which card from MTG |

After Ether's ability resolves, the next instant or sorcery spell you cast that turn will be copied whether or not it has targets and whether or not you spent the mana added by Ether's ability on that spell

This is not the normal Magic mechanic you are looking for

Theres no downside to animating your library either if it were to be destroyed or removed from the battlefield, you just put your library back to just being a library

Have Darksteel Forge on the field to make it indestructible plus anthem effects for artifact creatures from Tempered Steel and Chief of the Foundry

All that proliferation is great for you since you can make Tekuthal indestructible by removing three counters from other artifacts, creatures, and planeswalkers you control