I will probably make in the future different threads for different card types, but I would first like a feedback on these ideas in order to know if it's worth the effort. Thanks.

So here there are:

Fighter bomber:
Cost: 180
Hitpoints: 100
Movement: 5
Vision: 3
Shots per turn: 3
Range: 1-3
Damage:
Infantery Ground Air Building
10-12 15-18 10-12 15-18

Special activable ability:
Bomb - every 3 turns, this unit can make a minor artilery attack at its range

Advanced fighter:
Cost: 180
Hitpoints: 120
Movement: 6
Vision: 3
Shots per turn: 3
Range: 1-3
Damage:
Infantery Ground Air Building
9-11 13-15 15-18 13-15

Special activable ability:
AA Missile - every 3 turns, this unit can fire a missile at one enemy air unit, that deals 25-30 damage

Grenadier:
Cost: 80
Hitpoints: 60
Movement: 3
Shots per turn: 3
Vision: 2
Range: 1-2
Damage:
Infantery Ground Air Building
7-12 5-7 4-6 5-7

Special activable ability:
Throw grenade - every 2 turns, this unit can throw a grenade at an enemy ground unit, that deals 25-30 damage if its infantry or 10-15 damage if its a mechanical unit

Carpet bombing:
Cost: 100
Area of Effect: 3 (totaling 19 hexes)
Deal 20-25 damage to Infantry units in target area
Deal 10-15 damage to Mechanical units in target area