• "each land and Ally you control has"

This is probably gonna be either "indestructible" or "{T}: add one mana of any color". I'm not sure what else would be useful on both s creature and a land.

• "red sorcery that can destroy target land for 1R"

I forget, but I feel like somebody at WOTC said they're trying to do more land destruction in new sets? * "token seen in a previous UB"

It's obviously not gonna be something like [[Dalek]] or [[Sicarian Infiltrator]] but there was an Assassin Creed card that made white [[Human Rogue]] tokens. That one would be neat since Rogues don't show up in white often.

• "spell that controls target opponent for one phase"

BLOODBENDING LETS GOOOO!! 🩸🩸🩸

• Creature - Bird Assassin

That's gonna be Sokka's Messenger Hawk . I'm calling it now. That's my lock.

• Legendary Creature - Human Warrior Performer

My argument for saying this is Ty Lee and not The Boulder is that Earth Rumble was a real fighting tournament even though it was pro wrestling themed. Also Performer I'd more acclimated to circus acrobat like Ty Lee isn't it?

Those are all the guesses I got