Gandalf the White | Junk Diver | Myr Retriever

(and one other card)

You control a nontoken artifact with mana value one or less that can be cast using only colorless mana.

Activate
Krark-Clan Ironworks twice by sacrificing the nontoken artifact with mana value one or less and
Myr Retriever, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
When
Myr Retriever dies, its ability triggers twice, returning
Junk Diver and the nontoken artifact with mana one or less to your hand from your graveyard.
Cast
Junk Diver and the nontoken artifact by paying at most ({4} magic symbol) .
Activate
Krark-Clan Ironworks twice by sacrificing the nontoken artifact and
Junk Diver, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
When
Junk Diver dies, it triggers twice, returning the nontoken artifact and
Myr Retriever to your hand from your graveyard.
Cast the nontoken artifact and
Myr Retriever by paying at most ({3} magic symbol) .
Repeat.