If Ra has Flame Barrier and Flesh of the Sun God out, does he deal retribution damage on taking fire damage?
If Wraith has Combat Stance and Smoke Bombs, and redirects one damage to herself (so that she takes zero damage), does she still do retribution damage?
If Tachyon uses Hypersonic Assault, and Baron Blade has Mobile Defense Platform out, can Baron Blade deal damage on his next turn? What if Baron Blade had Living Forcefield instead of Mobile Defense Platform?
1. Since Ra is immune to Fire damage he does not take any when dealt Fire damage. This does not activate Flame Barrier.
2. If no damage is dealt to The Wraith, I believe that she deals no retribution damage. I'm not for sure on this one, but I would be surprised if she dealt retribution damage after taking 0 damage.
3. Since Baron Blade is immune to damage when a Mobile Defense Platform is out, he takes no damage and Hypersonic Assault doesn't prevent him from dealing damage. This is because (the cards are not in front of me, mind you, but I believe) Tachyon's Hypersonic Assault reads something like "Targets dealt damage this way cannot deal damage until the start of your next turn."
Taking 0 damage is the same as not having damage taken. So, in the second case, The Wraith would not have her Combat Stance kick in.