one piece card game memorial collection extra booster box TCG - EB01 Oden and Kyros Why's it so expensive? :

He has a pretty good anthem and is even an excellent (no mana cost) discard outlet for madness cards (Dark Withering) and setting up reanimation (Reanimate)

The true impact of this card, and the Room mechanic as a whole, will only become clear as we see more previewed cards in the next few days

Getting back a Devoted Druid with (effective) haste enables the deck to recover against removal and grind out longer games

While X sadly cannot be 0 here, the or less clause is a nice inclusion allowing Thieving Skydiver to be kicked for 1 and still steal powerful, zero-mana artifacts such as Stonecoil Serpent, Hangarback Walker, and Mox Amber

Its also a decently sized creature with frample (flying + trample)