Cogwork Assembler by paying ({7} magic symbol) , creating a token copy of
Myr Battlesphere with haste.
When the
Myr Battlesphere token enters the battlefield, it and
Mana Echoes trigger.
Resolve the
Myr Battlesphere trigger, creating four 1/1 Myr artifact creature tokens.
When the Myr enter the battlefield,
Mana Echoes triggers four times.
Resolve all
Mana Echoes triggers from steps 2 and 4, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) for each Myr you control.
Repeat.
Once you have infinite mana, you may target any artifact instead using
Cogwork Assembler's ability.
Activate
Cogwork Assembler three times by paying ({7} magic symbol) three times, creating three token copy of
Cogwork Assembler with haste.
The token copies of
Cogwork Assembler enter the battlefield triggering
Mana Echoes three times, adding twelve ({C} magic symbol) .
Activate
Cogwork Assembler by paying ({7} magic symbol) , creating a token copy of
Cogwork Assembler with haste.
The token copy of
Cogwork Assembler enters the battlefield triggering