Phylath, World Sculptor | Cloudstone Curio | Phyrexian Altar

Cards

Phylath in hand or in the command zone.
Cloudstone Curio and
Phyrexian Altar on the battlefield.
You control at least six basic lands.
({4} magic symbol) ({R} magic symbol) ({G} magic symbol) plus enough mana to pay for commander tax, if applicable available.

Cast
Phylath either from your hand or from the command zone by paying ({4} magic symbol) ({R} magic symbol) ({G} magic symbol) and commander tax, if applicable.
When
Phylath enters the battlefield, its first ability and
Cloudstone Curio trigger.
Resolve the
Phylath trigger, creating at least six 0/1 Plant creature tokens.
When the Plants enter the battlefield,
Cloudstone Curio triggers that many times.
Resolve the first trigger, returning
Phylath to your hand from the battlefield.
Resolve all remaining triggers, choosing not to return anything to your hand.
Activate
Phyrexian Altar six times by sacrificing six Plants, adding ({4} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Repeat.
If you control seven or more basic lands, this combo nets infinite Plant tokens and infinite colored mana.