And here we get to the fun part.
If the enemy has normal shields, the damage is reduced normally. Thunderbird's attack does 3 damage, Lighting does 5 damage.
If the enemy has shields of chance, then it still looks like normal - everything hits or not.
If the enemy has a Reflective Shield, the Lighting goes at YOU.
With the Elite one, it's even funnier. When the Lighting is separated from how the attack went, it will try and hit ALWAYS. Dimshield doesn't block spells, Bonewall doesn't block spells, just the initial 7 damage... Dusk Mantle may make the 7 damage miss, but not the Lighting.
But, of course, Reflective Shield does the job of reflecting the Lighting at you.
And, even funnier and possibly in an overpowered way, Adrenaline on Thunderbird does 3 attacks - 6+L , 4+L and 2+L. If L is not reflected, it's 27 damage.
Elite one gets 7+L, 5+L, 3+L to a whoopassing 30 damage... unless you can reflect the spells, still, then it's 15 damage to enemy and 15 to you.
And Elite one is not stopped by Sundials... hm, I should bump it cost to 14, actually.
(and comment on Ward of Light pls unless you did)