({3} magic symbol) ({U} magic symbol) ({U} magic symbol) plus ({1} magic symbol) for each time you've cast
James / Follow Him from the command zone this game, plus commander tax if applicable available.
Steps
Cast Follow Him either from your hand or from the command zone by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) plus ({1} magic symbol) for each time you've cast
James / Follow Him from the command zone this game, plus commander tax, if applicable.
Resolve Follow Him, creating at least three Clue tokens and returning Follow Him to the command zone from exile.
Activate
Urza's first ability by tapping a Clue, adding ({U} magic symbol) .
Activate
Krark-Clan Ironworks by sacrificing the tapped Clue, adding ({C} magic symbol) ({C} magic symbol) .
Repeat from step 2 until you control no Clues.
Cast Follow Him from the command zone using all available mana, creating a number of Clue tokens and returning Follow Him to the command zone from exile.
Repeat from step 3.
Notes
Once you have infinite mana, you may cast
James infinitely if desired. You can also activate the Clues to draw cards and/or
Urza's ability.
Once you have infinite mana, you may use it to activate
Urza's ability.
Results
Infinite LTB.
Infinite ETB.
Infinite sacrifice triggers.
Infinite death triggers.
Infinite colorless mana.
Infinite storm count.
Infinite card draw.
Infinite blue mana.
Infinite draw triggers.
Infinite magecraft triggers.
Exile your library.
Cast all spells in your library for free.
Infinite commander casts.
Cast all cards in your library without paying their mana costs.