At 20th level, a spirit dancer has perfected his dance. He can now use each of his supreme spirit powers' once-per-day abilities one time each day, instead of just one ability. He can use his spirit troika by spending 2 rounds of spirit dance instead of 3. Finally, he can enter a spirit dance with all six of his prepared spirits at once by spending 4 rounds of spirit dance each round.
This ability replaces astral beacon.