Cast Rite of Replication with kicker by paying 7, targeting Precursor Golem.
Precursor Golem's second ability triggers, creating a kicked copy of Rite of Replication targeting every other Golem.
Resolve the first Rite of Replication, creating five token copies of the Golem it is targeting.
If the Golem was Percursor Golem, the Percursor Golem tokens enter the battlefield, triggering their first abilities, creating a total of ten 3/3 Golem artifact creature tokens.
Repeat from step 3 for each other Rite of Replication.
Cast Chandra's Ignition by paying 3, targeting any Golem.
The six Percursor Golems' second abilities each trigger, creating six copies of Chandra's Ignition targeting every other Golem.
Resolve the first Chandra's Ignition, causing the Golem to deal damage equal to its power to each other creature and each opponent.
Repeat step 8 for each remaining Chandra's Ignition.
This explosive sequence begins by leveraging Precursor Golem, whose reflexive entering triggers populate your board with extra Golem tokens, while its unique targeting clause turns a single-target spell into a massive multiplication engine. When you feed a kicked Rite of Replication into this network, Precursor Golem's ability cascades the copy across every single Golem on the field, resulting in an overwhelming tidal wave of new Golem tokens and infinitely more copies of the spell. With your army safely protected from self-inflicted damage by Eldrazi Monument's passive indestructible grant, you can safely cast Chandra's Ignition on one of your Golems. Precursor Golem's multiplication clause copies that Chandra's Ignition for every other Golem, letting the targeted Golems unleash redundant waves of high-power damage that sweep the board and incinerate your opponents all at once.