The character banished needs to have one strength or less but this works out since many of the early-game characters your opponent will play will most likely be weak anyway
Creatures, lands, artifacts, all of them
The Temporal Anchor Its hard to actually recommend playing The Temporal Anchor since its a 6-mana artifact with no effect for a full turn cycle
She has the useful 'Choose a Background' ability, which lets you pick an aura enchantment with the 'background' subtype to be another commander, effectively making her a two-color commander
it's become a staple in Cube and Constructed formats like Pauper
It's playable in major Eternal formats, namely Commander, Legacy, and Pauper