This dragon hydra costs X and one Red mana, and enters with X +1/+1 counters on it
Pair it with something that has a strong enter the battlefield effect, particularly those that let you untap lands, and youll have yourself an infinite mana loop in no time
I never played with that card, and its a pain in the ass to play against, and it wasnt rotating either
It reads like some sort of top-tier mana rock for typal decks, but its worse than the average 2-color Signet or Talisman, and its just strictly worse than Arcane Signet
The Black Timeshifted Cards The black cards of the timeshifted collection are also looking good, and many of them are essential for Modern, Legacy and Commander
It's hardly a wincon on its own, but to get small advantages, be it from your graveyard or your opponents