Ulalek, Fused Atrocity | Strionic Resonator | Kozilek's Unsealing

(and one other card)

Eldrazi Creature Card with MV=4, 5 or 6

({2} magic symbol) ({C} magic symbol) ({C} magic symbol) plus enough mana to pay for the Eldrazi spell available.

Cast an Eldrazi from your hand by paying its mana cost.
Ulalek triggers, the Eldrazi cast triggers if it has a cast ability, and
Kozilek's Unsealing's first ability triggers.
Holding priority, activate
Strionic Resonator by paying ({2} magic symbol) and tapping it, copying
Ulalek's trigger.
Resolve the copy of
Ulalek's trigger, causing you to pay ({C} magic symbol) ({C} magic symbol) to copy the Eldrazi spell,
Ulalek's trigger, the Eldrazi cast trigger if it had one, and the
Kozilek's Unsealing trigger.
Resolve the Eldrazi cast trigger, if applicable.
Resolve the copy of the
Kozilek's Unsealing trigger, creating two 0/1 Eldrazi Spawn creature tokens.
Activate both Eldrazi Spawn creature tokens by sacrificing it, adding ({C} magic symbol) ({C} magic symbol) .
Resolve the copy of
Ulalek's trigger from step 4, causing you to pay ({C} magic symbol) ({C} magic symbol) to copy the Eldrazi spell,
Ulalek's trigger, the Eldrazi cast trigger if it had one, and the
Kozilek's Unsealing trigger.
Repeat from step 5.