Unlimited food build (Long Beak, Burrowing, Turtle Down)
Just stumbled upon this surprising combo in the "Unintelligent Design" challenge.
Long beak lets you close up unoccupied burrows for food. Burrowing lets you create unoccupied burrows. And bafflingly, Turtle Down resets the cooldown for Burrowing -- letting you create a new burrow every 3 seconds! Burrow after burrow after burrow.
With these three abilities you can litter the world with closed-up burrows and generate tons of food! It seems like a bug where maybe Turtle Down isn't supposed to reset your Ultimate's cooldown -- but whatever it is, it's very powerful.
Edit: After about 2 minutes, the combo stopped working and Turtle Down reset Burrowing's cooldown to 0%... And after another 2 mintes, the combo started half-working and Turtle Down reset Burrowing's cooldown to 60%. So... not very reliable, but pretty OP when it works