Which promo cards are permitted in Constructed tournaments?
If I had a team with Omega Supreme and Decepticon Skrapnel and someone attacked my Skrapnel for 15 damage but because of his ability (can only take 3 damage) Does two of those 3 damage go over to Omega Supreme? Therefore Skrapnel will only take 1 damage?
Yes, you can choose to allocate the attack damage that way in this scenario.
Ultra Magnus Armor
would not reduce the damage Omega Supreme would take because the damage is still Attack damage.
On the topic of being able to choose the order of effects, how would/could Omega Supreme's bot mode ability work with another character having a Force Field
If two effects would apply to the same attack damage, the player receiving the damage chooses one to apply. Then, if the other still applies, apply that effect. If no other effects apply to the attack damage, the attack damage is finished.
For example, if you have a character with a Force Field
and Omega Supreme, and that character would take 6 attack damage, you could choose either of the following:
1. Apply Force Field first, scrapping it and reducing the attack damage to 4, then use Omega Supreme’s ability to change the attack damage to: 2 to the other character and 2 to Omega Supreme.
2. Apply Omega Supreme’s ability first, changing the attack damage to 4 to the other character and 2 to Omega Supreme. Force Field no longer applies and will stay on the other character.