This is the era of Dark Ritual, a card so powerful it warped games around it, and the Specter is the reason why

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If you resolve Teferi and can untap into casting a Cryptic Command or a Time Warp effect then it is almost impossible to lose from that position
This black praetor is so solid in any format and in so many different builds
You choose the target of the triggered ability as it goes on the stack, but you choose whether or not to fight as that ability resolves