You look at each other and can read each others thoughts because the merging merged your brains together. What the both of you thought of was that you should drink up the entire lake.
And with that you swam out onto the center and started drinking it up after a couple of hours the entire bulk of your body started to cramp up as muscles stretched and grew and bones cracked as they lengthened.
After 10 minutes of this you stood up to look at your body and at Amanda.
What you noticed that was different was that the two of you had felt vertigo as you grew up and out an extra 1080 Kilometres to a height of 1,080,006.7 metres tall with the largest large muscles that can wipe entire islands and a tail 980 m long and is the most flexible of them all. You gained an extra 80,000 tonnes of muscle and had a long, fearsome snout with some human features and horns on the head with XX breasts.