Rukarumel, Biologist + Scuttling Sliver + Basal Sliver + Biomancer's Familiar

Rukarumel, Biologist

Scuttling Sliver

Basal Sliver

Biomancer's Familiar

How it works

1. Activate Rukarumel by paying 1 due to Biomancer's Familiar and tapping it, creating a 1/1 Sliver creature token.
2. Activate the Sliver token using the ability granted to it by Basal Sliver by sacrificing it, adding .
3. Activate Rukarumel using the ability granted to it by Scuttling Sliver by paying 2, untapping Rukarumel.
4. Repeat.

This engine relies on Rukarumel, Biologist to blanket your entire board and deck with the Sliver creature type, allowing the rest of the toolkit to seamlessly interact. Basal Sliver provides the fuel by letting you sacrifice those newly minted Slivers for black mana, while Scuttling Sliver grants an untap ability that keeps the primary playmaker ready for action. To make the math work, Biomancer's Familiar steps in as a vital cost-reducer, discounting the untap ability so you can repeatedly loop the activation of Rukarumel, Biologist to generate infinite sacrifices, deaths, and entries.