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9 loyalty Player 3 - During his or her upkeep, Player 1 uses Teferi, Master of Time to use its first ability to +1 and Loot

Permanents entering the battlefield also do not by themselves create a priority window, unless them doing so triggers some other ability

If your commander is something like Emry, Lurker of the Loch, you can pitch your hand to Lions Eye Diamond, take the three blue mana to cast Emry, and then on a later turn use her to recover the Lions Eye Diamond plus any other artifacts you pitched

Both cards had already been officially revealed

The gang started out as an antagonistic group only later to become allies in the anime series