I figure the king of the sea (and one of the two oldest Marvel characters) should be in here at some point. With such a long history, he has a lot of possibilities, so this is just one potential set:
***** Namor (The First Mutant) *****
Strength of the Ocean
Blue Passive
- Namor draws strength from contact with water, using it to power his strikes and heal himself, but he can be weakened if deprived of it. If his team has less than 5 Blue AP, all damage done by Namor is reduced by 25%. Between 11-20 Blue AP, all his damage is increased by 25%. 21+ Blue AP, all his damage is increased by 50%, and he heals 158 damage per Turn.
2 Covers: -20% below 4 Blue AP. +30% at 9-19, +60%, and heals 204 Damage per Turn at 20+.
3 Covers: -15% below 3 Blue AP. +40% at 7-16, +80%, and heals 260 Damage per Turn at 17+.
4 Covers: -10% below 2 Blue AP. +50% at 5-13, +100%, and heals 316 Damage per Turn at 14+.
5 Covers: -5% if no Blue AP. +60% at 3-10, +120%, and heals 371 Damage per Turn at 11+
Out of Your Element
9 Purple
- Namor drags an opponent beneath the waves, restraining and slowly drowning them. Select an opposing Character and a Blue basic tile. The chosen tile becomes a 2-turn Countdown tile. While it is on the board, the chosen Character is stunned, and takes 646 Damage per Turn. Additionally, Namor gains 2 Blue AP per Turn the Countdown is on the board.
2 Covers: 838 Damage per Turn
3 Covers: 1404 Damage per Turn. Gains 3 AP per Turn
4 Covers: Countdown lasts for 3 Turns
5 Covers: 1989 Damage per Turn
Improvised Weaponry
12 Green
- Namor grabs some nearby large object, ranging from a car up to a naval destroyer, and hurls it at his foes. Deals 2423 Damage to a random enemy, and then destroys 5 random tiles. Destroyed tiles do not generate AP, but deal their damage to the enemy Team.
2 Covers: Destroys 8 tiles
3 Covers: 3519 Damage
4 Covers: Destroys 10 tiles
5 Covers: 4448 Damage
And yeah, the First Mutant title has been retconned away, but I feel like he still deserves that gravitas. And it does still fit based on publishing history.