In melee, if the player with the Master of Whispers title attacks you and wins the challenge, you may kneel Mya Stone to cause all players to whom the Master of Whispers chooses to apply intrigue claim to suffer power claim instead.
If you have a Driftwood Cudgel in play and multiple Drowned God characters you control are being killed (e.g. from Valar Morghulis), you may trigger the Cudgel once (and only once) for each character. If you reach 15 power before the effect resolves, you win.
Example: You have Aeron Damphair, Tarle the Thrice-Drowned, and a Priest of the Drowned God in play, with a Driftwood Cudgel on Damphair, and you are at 12 power. You reveal Valar Morghulis. You can trigger the interrupt of the Cudgel to move it to Tarle (who gains a power), then trigger to move to the Priest (who gains a power), then trigger to move to Damphair (who gains a power). You cannot trigger the effect again, as you have already triggered this Cudgel to interrupt Damphair’s death. However, you have won the game by reaching 15 power before the effect of Valar Morghulis resolves.