Even though he was outnumbered and surrounded with his life definitely on the line, Riddled Tree wasn't that worried at his predicament. Sato's earlier strike was just a regular one and it had only taken out a little above 30 HP from his total Health.
As for the encirclement that he was caught in between, Riddled Tree didn't feel much about it instead, his worries were based on the future results. In other words, to Riddled Tree, even if he were to somehow escape this predicament he still wouldn't be able to escape his death unless he somehow turned the battle around.
Realising that the attacks were already closing up on him, Riddled tree made the decision to face the attack head on.
"[Nature's Enticement]'
As Sato's attack was about to land, Riddled Tree gently knocked the edge of his staff against the floor before yelling out.