In general, a spell that can't be countered can still be the target of spells and abilities as normal (see also this thread). Carnage Tyrant's hexproof ability doesn't change that, since it works only while Carnage Tyrant is on the battlefield, not while it's on the stack (C.R. 112.6, 702.11b).
Thanx! So if I do this, the Essence Scatter will still resolve but nothing will happen?
Essence Scatter will still get to resolve provided it has a legal target; it's just that it won't do anything when it resolves if the targeted spell can't be countered (C.R. 101.2, 101.3, 608.2b-c). (Note that for triggered abilities of the form "Whenever a player casts a blue spell...", as in Kraken's Eye, the ability triggers as soon as the spell in question is cast; the spell need not resolve [C.R. 601.2i, 603.2].)
I'm a simple Magic player since 1 year ago from China. Now I live in New Jersey.
I'm a simple Magic player since 1 year ago from China. Now I live in New Jersey.