Thrumming Pool is bugged. When turned into a treasure with Kitesail Larcenist it should lose all abilities and become a treasure. However it continues to give all slivers double strike and haste.

1. Target opponents thrumming pool with kitesail larcenists etb trigger. resolve and pass turn.
2. PC/Steam.
3. Thrumming Pool visually updates and upkeep trigger does not occur; however sliver creatures continue to gain haste and double strike.
4. Thrumming Pool should lose all abilities (no upkeep trigger, sliver creatures should no longer be have haste and double strike from Thrumming Pool) and become a treasure that can be tapped and sacrificed for 1 mana of any color.
5. see attached.