The Ooze + Basking Broodscale + Zameck Guildmage

The Ooze

Basking Broodscale

Zameck Guildmage

How it works

1. Activate Zameck Guildmage's first ability by paying .
2. Cast Basking Broodscale by paying 1.
3. When Basking Broodscale enters with a +1/+1 counter on it due to Zameck Guildmage, it triggers, creating a 0/1 Eldrazi Spawn creature token that'll also enter with a +1/+1 counter on it.
4. Activate the Eldrazi Spawn by sacrificing it, adding C.
5. When the Eldrazi Spawn dies, The Ooze triggers, creating a Mutagen token.
6. Activate the Mutagen by paying 1, tapping and sacrificing it, putting a +1/+1 counter on Basking Broodscale.
7. Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that'll enter with a +1/+1 counter on it.
8. Repeat from step 4.

This clever synergy relies on Zameck Guildmage setting the stage so that Basking Broodscale enters the battlefield with an initial +1/+1 counter, instantly triggering the Broodscale to create an Eldrazi Spawn token. When you sacrifice that Eldrazi Spawn for mana, its departure triggers The Ooze, which responds by spawning a Mutagen artifact token. Cracking that Mutagen allows you to feed a fresh +1/+1 counter right back onto Basking Broodscale, restarting the entire loop while generating an endless cascade of artifact and creature triggers.