Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Maskwood Nexus, Grovetender Druids triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding {C}{C}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.
Once you have infinite mana, you may forego sacrificing the Plants.

Infinite colorless mana

Infinite creature tokens

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Grovetender Druids

Maskwood Nexus

Ashnod's Altar

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Maskwood Nexus, Grovetender Druids triggers.
Holding priority, activate Phyrexian Altar by sacrificing the Plant, adding {1}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.

Phyrexian Altar

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Arcane Adaptation, Grovetender Druids triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding {C}{C}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.
Once you have infinite mana, you may forego sacrificing the Plants.

Arcane Adaptation

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Conspiracy, Grovetender Druids triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding {C}{C}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.
Once you have infinite mana, you may forego sacrificing the Plants.

Conspiracy

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Xenograft, Grovetender Druids triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding {C}{C}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.
Once you have infinite mana, you may forego sacrificing the Plants.

Xenograft

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Conspiracy, Grovetender Druids triggers.
Holding priority, activate Phyrexian Altar by sacrificing the Plant, adding {1}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Xenograft, Grovetender Druids triggers.
Holding priority, activate Phyrexian Altar by sacrificing the Plant, adding {1}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.

Cast Grovetender Druids by paying {2}{G}{W}.
When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
When the Plant enters the battlefield as an Ally due to Arcane Adaptation, Grovetender Druids triggers.
Holding priority, activate Phyrexian Altar by sacrificing the Plant, adding {1}.
Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
Repeat from step 3.

Combos with "Grovetender Druids"