Urza, Prince of Kroog | Prized Statue | Training Grounds (and one other card)

Cards

All permanents on the battlefield (
Kaya with two or more loyalty counters on it).

Activate
Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
Activate
Urza by paying ({4} magic symbol) , creating two token copies of
Prized Statue that are 1/1 Soldiers in addition to their other types.
When the
Prized Statue tokens enter the battlefield, they trigger, creating four Treasure tokens.
Activate four Treasures by tapping and sacrificing them, adding ({4} magic symbol) .
Repeat from step 2.

This combo has been estimated to be Exhibition (Bracket 1+).