[quote=@The Irish Tree]
<Snipped quote by Kangutso>

Technically speaking he can make them as large as he wants as shown when he dropped Grot into the ocean, but the larger the portal the more strenuous it is. I had to spend might to have him make the Grot portal stay open long enough to dunk him.
[/quote]

I know, I made a joke.

Also... why didn't he just portal Grot into outer space?