These can be identified by the set code in the bottom left corner, which shows as M1L
Since it was its own sheet, if you got a rare or mythic rare double-faced card, you'd also get a rare or mythic rare single-faced card in the booster
That being said, all the best red token generators can be roughly grouped into: Those that create Treasures, Those that create a copy of a creature you control, usually exiling or sacrificing it at the end of combat or end of turn, Those that spawn 1/1 creature tokens, Those that create some really big dragons
$139.15 $135.00 $4321.00 Mega Zygarde ex is a powerhouse that commands attention in every Pokmon collection
I think Blanchwood Armor is a steal at that price
It can produce multiple mana of different colors in a single tap, and in multi-color decks it frequently produces three to five mana per activation