Each of those, like the Darkness Crystal, will reduce the mana required to cast a spell in its appropriate color by 1, and will cost four mana two of the color of choice, but the rest is unique to each Crystal
The fact that you can double the damage as well as fuel possible land drop synergies isn't likely to make this one playable
All are fine picks for a vampire deck, but Ive actually lost to the Drana, Liberator of Malakir and Drana, Kalastria Bloodchief in Commander games, so thats how you decide how to prioritize these
And even in a stalemate, it can also produce a creature to break through an opponents defenses either by attacking a player directly or transforming into Zilortha and negating whatever blockers they might have
It gets even better if you can flicker it to make it enter the battlefield again too, because then you can just keep doing it
From the One Ring and the temptation it offers to the story beats and characters we love in The Lord of the Rings , this release brings the same tabletop- Magic -meets-Middle-earth adventure to your PC and mobile phone