By shielding your board with Hushwing Gryff, you cleanly bypass the crippling drawback of Wormfang Manta—meaning its entering-the-battlefield trigger is mercifully silenced while its leaving-the-battlefield trigger still resolves to hand you extra turns. Into this loop steps Thassa, Deep-Dwelling, whose relentless end-step ritual blinks the Wormfang Manta away and back again turn after turn. Because Hushwing Gryff continues to suppress the downside, you harvest a never-ending stream of bonus turns without ever having to pay the price of skipping a beat.