Its whole deal is that it generates more than enough Blood tokens each turn that you can use them to sneak vampires in, tapped and attacking, from your hand
This split card has three names
Creature - Eldrazi Color tag templates(None) Syphon Mind Each other player discards a card
Pick the fastest path: print from a list, start with a precon, design custom cards, or browse set printings
Their names are fairly generic, but Id expect more versions of the Medallions before the Crystals get their first reprints
These cards have their merits, especially if you prefer a more competitive approach to Commander, but if you find yourself conflicted about including them, its completely justifiable to keep playing what you enjoy instead