8 loyalty Player 2 - During his or her upkeep, Player 1 uses Teferi, Master of Time to use its first ability to +1 and Loot
The first thing I think of when seeing this card are mass-sacrifice effects, like Plumb the Forbidden and God-Eternal Bontu
With the horrors from the deep deck being a Simic deck, Allegiance will give me a tonne of new cards to consider for it
The bona fide money cards
Cruella De Vil, Miserable as Usual allows you to return a character back to a player's hand , showing off that once a character is on the field, they can be bounced back to their owner, forcing them to pay more ink to bring them back or get rid of them
The Law card from ST13 has become infamous since its release, with its power in OP07 and OP08 in the Eastern metagame becoming so uncontrollable that Bandai simply banned the Leader