I think I figured out 2 ways to use the Compulsion Cannisters, both of which have fun with the Ember Shaman from Magmaria. The easiest way to get Magma Crystals in all the applicable heroes' hands is with Fiery Crystallization.
Method 1:
Setup is Skyscraper, AZ, Visionary, and PW Haka at Magmaria. Skycraper should be in Tiny mode with a Compulsion Cannister and Magma Crystal in hand. PW Haka charges AZ so his next attack will be over 10. Visionary has played Twist the Ether on AZ. AZ has both modules and Coolant Blast out and a Magma Crystal in hand. Magmaria has Ember Shaman out.
Ember Shaman activates at the end of the Environment turn, first allowing Skyscraper to use a power by discarding her magma crystal. Skyscraper uses her power to play Compulsion Cannisters from her hand on AZ. Twist the Ether so the damage is fire, so AZ will now hit himself for 11+ fire damage, Isothermic Inducer will react and then Null-Point Calibration will heal him for 11+ health. Aim the second damage at any non-hero target (it really doesn't matter, as long as you don't kill the Ember Shaman). AZ can now discard his magma crystal in order to use Coolant Blast and deal 11+ damage to any non-hero target.
While this is specifically designed for Compulsion Cannisters to be used, its actually a lot simpler if you subsitute Stuntman for Skyscraper, as you don't need Twist the Ether. Setup is Stuntman, PW Haka, and AZ. Stuntman has Lance-Flammes out and a Magma Crystal in hand. PW Haka charges Stuntman, and AZ has both modules and Coolant Blast out, Magma Crystal in hand. Magmaria has Ember Shaman out.
Ember Shaman activates at the end of the Environment turn, first allowing Stuntman to discard a magma crystal to use Lance-Flammes to hit AZ for 11+, Isothermic Inducer reacts and AZ heals back up. AZ discards his magma crystal in order to use Coolant Blast to deal 11+ damage to any non-hero target.
You can get this same thing to happen if only AZ has a Magma Crystal, as long as Stuntman has a way to use a power during the Environment turn before Ember Shaman activates.
Method 2:
This doesn't require AZ to have any cards played out yet.
Setup is Skyscraper, PW Haka, FS Parse, F5 Legacy, and AZ (in that order). Everyone but AZ must have a Magma Crystal in their hand. Skyscraper should be in Tiny mode with a Compulsion Cannister in her hand. PW Haka charges AZ and has Haka of Restoration with 9+ other cards in hand (not counting Magma Crystal), FS Parse has 3 Critical Multipliers out, with Recompile on the bottom of her deck, and AZ has Frost-Bound Drain or Hoarfire in his hand (or on the bottom of the deck).
Ember Shaman activates at the end of the Environment turn. Skyscraper discards Magma Crystal to play the Compulsion Cannister on AZ. AZ deals himself 11+ damage, and then deals damage to any non-hero target. PW Haka discards Magma Crystal to play Haka of Restoration to heal AZ for 11+. FS Parse discards Magma Crystal (gives +3 from Critical Multipliers to AZ), plays Recompile, discards 2+ cards (gives +6 from Critical Multipliers to AZ). If the damage dealing one-shot for AZ is on the bottom of the deck play it now with FS Parse's power, aiming at any non-hero target (2/3 damage + 9 damage from Critical Multipliers). If the damage dealing one-shot for AZ is in his hand, play it with F5 Legacy's power.
Again, this is designed to use Compulsion Canisters, but all that is happening is that AZ is taking 11+ damage with it, so you could actually cut it out completely, give the Magma Crystal to AZ instead, and just use his base power to deal himself 11+ damage (just make sure that AZ is before FS Parse in the order)