Cast Broodguard Elite for its warp cost by paying {1}{G}.
Activate Phyrexian Altar by sacrificing Broodguard Elite, adding {G}.
When Broodguard Elite dies, it and Enduring Renewal trigger.
Resolve the Broodguard Elite trigger, putting a +1/+1 counter on Basking Broodscale.
Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token.
Resolve the Enduring Renewal trigger, returning Broodguard Elite from your graveyard to your hand.
Activate the Eldrazi Spawn by sacrificing it, adding {C}.
Repeat.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite storm count

Enduring Renewal

Broodguard Elite

Basking Broodscale

Phyrexian Altar

Cast Broodguard Elite for its warp cost by paying {1}{G}.
Activate Phyrexian Altar by sacrificing Broodguard Elite, adding {G}.
When Broodguard Elite dies, it and Enduring Renewal trigger.
Resolve the Broodguard Elite trigger, putting a +1/+1 counter on Workhorse.
Resolve the Enduring Renewal trigger, returning Broodguard Elite from your graveyard to your hand.
Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Repeat.

Workhorse

Cast Broodguard Elite for its warp cost by paying {1}{G}.
Activate Ashnod's Altar by sacrificing Broodguard Elite, adding {C}{C}.
When Broodguard Elite dies, it and Enduring Renewal trigger.
Resolve the Broodguard Elite trigger, putting a +1/+1 counter on Crystalline Crawler.
Resolve the Enduring Renewal trigger, returning Broodguard Elite from your graveyard to your hand.
Activate Crystalline Crawler by removing a +1/+1 counter from it, adding {G}.
Repeat.

Infinite colorless mana

Infinite colored mana

Infinite +1/+1 counters on creatures you control

Crystalline Crawler

Ashnod's Altar

Cast Broodguard Elite for its warp cost by paying {G}.
Broodguard Elite enters the battlefield and dies as a state-based action due to having 0 toughness, triggering Pitiless Plunderer and Enduring Renewal.
Resolve the Pitiless Plunderer trigger, creating a Treasure token.
Resolve the Enduring Renewal trigger, returning Broodguard Elite from your graveyard to your hand.
Activate the Treasure by tapping and sacrificing it, adding {G}.
Repeat.

Pitiless Plunderer

Combos with "Broodguard Elite"