The other parts you need are simply a zero-cost sacrifice outlet and some effect that can place a +1/+1 counter on creatures as they enter the battlefield: Grumgully, Path of Discovery, Juniper Order Ranger, or Rhythm of the Wild for example
Coupled with cards such as Soul Warden, Souls Attendant, and Aetherflux Reservoir you can keep manipulating your life total as much as you please
2 Play Modes: Single and Multiplayer 3 Play Levels: Beginner, Advanced, Expert For 1 or more players ages 7 plus, 15 minutes playing time
There's no way to have the ability trigger if there aren't enough card types, even if you intend to raise that number in response to the triggered ability
#30 Ulalek, Fused Atrocity The eldrazi in Modern Horizon 3 really rounded out the mana curve of eldrazi decks with great cards to play at mana values 3, 4, and 5
A 5-mana instant with literally no text is a major downside