When my magic-user declares a heroic channel, can he move while channeling? What can my caster do when performing a heroic channel (aside from cast a spell), can he call a with me and sprint forward to tranfix and charge a troll? Or does he merely cast a channeled spell and do nothing more?

Hello,
When you declare an Heroic Channelling, the hero calling it can use the more powerful version of any spell during his turn.
The heroic action is nothing more than that. No heroic march/move, no "with me" call,...
However, the hero can still benefits from an heroic march/move from an other friendly hero in the same turn that he called his Heroic Channelling.

Remember that the players must declare the heroics at the beginning of the phase, so if your caster is charged before he moved, the Heroic Channelling is lost

Interesting, heroic channelling has some interesting limitations

I always see the heroic channelling like a "Super Saiyan" version of the caster :p
But it doesn't have any other roles that activating the "god mode" ^^

So you're still vulnerable (as always with caster) to be charged before you can do anything (i.e. moving and casting your spell) :/

When I want to channel a spell, I try to announce it at the end. If not, if there is an ennemy hero, you can be sure that he'll heroic move to pin you in place :p

So once I've heroic channelled and cast my spell, can I move the spell caster during the regular move phase

The heroic channel doesn't happen first. It happens when it is the caster's turn to move.

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12th GBHL 2013.
13th GBHL 2014
9th GBHL 2015


Mid Sussex Wargamers

But you pay at the beginning of the turn, correct?

All heroic actions are declared just at the beginning of the phase (move phase, shoot phase, fight phase...).
So before anybody moves, the players say if they wish to declare any heroic for the move phase (heroic move, heroic march or heroic channelling).

Only the "heroic move" allows a player to steal priority. Both heroic march and heroic channelling allow the player to make unique actions, but they are resolved when its your turn to play

That makes sense