Steelswarm Operator + Filigree Sages + Biomancer's Familiar

Steelswarm Operator

Filigree Sages

Biomancer's Familiar

How it works

1. Activate Steelswarm Operator's second ability by tapping it, adding that can only be spent to activate abilities of artifacts.
2. Activate Filigree Sages by paying , untapping Steelswarm Operator.
3. Repeat.

This infinite mana loop is orchestrated by pairing Steelswarm Operator with Filigree Sages, using Biomancer's Familiar to discount the Sages' activation cost down to just a single blue mana. Because Steelswarm Operator's specialized mana can pay for the very ability used to untap it, you can continuously loop the two creatures. Meanwhile, Biomancer's Familiar sits quietly in play providing that crucial cost reduction, turning what would normally be a mana-neutral loop into an engine that generates infinite blue mana restricted to artifact abilities.