Mythos of Illuna | Radiate | Spark Double

(and one other card)

Spark Double is a copy of
Tamiyo.
At least four loyalty counters on
Spark Double.
There are permanents on the battlefield that enter the battlefield untapped and produce at least ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) ({R} magic symbol) .

({5} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) ({R} magic symbol) available.

Cast
Mythos of Illuna by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting anything.
In response, cast
Radiate by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , creating copies of
Mythos of Illuna that target each permanent besides the original target.
Resolve all copies of
Mythos of Illuna including the original, creating token copies of each permanent.
Activate a copy of
Tamiyo by removing three loyalty counters from it, returning
Radiate from your graveyard to your hand.
Activate another copy of
Tamiyo by removing three loyalty counters from it, returning
Mythos of Illuna from your graveyard to your hand.
Activate the token lands or other mana-producing permanents created in step 3 by tapping them, adding at least ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Repeat, doubling the number of copies created in step 3 each repetition.
Once you have infinite nonlegendary copies of
Tamiyo, you may activate
Tamiyo abilities any number of times.