I created the Sejuani constellation. Your feedback would be appreciated.

Sejuani / COMBO / HARD

Normal

When you play your first unit each round, give the strongest enemy Frostbite and Vulnerable this round.

Rare

Start mana + 1

Whe an ally strikes a unit with 0 Power, kill it. and reduce the cost of all allies in hand by 1.

Epic

When you play your first three units each round, give the strongest enemy Frostbite and Vulnerable this round.

If you slay three or more enemies in this game, level up Sejuani.

Legendary

When you slay an enemy unit, the strongest ally strikes the enemy Nexus.

Epic Relics

+0/3

Attack: I attack the strongest enemy that has negative keywords.

I would appreciate a lot of feedback. :)