What does everyone think of the following rewards for earning additional valor? It's kind of generic, but I think it gives something after 15 valor to strive towards.
At 25 valor, generate 4 mana per turn instead of 3.
At 50 valor, max hand size increased to 8 instead of 7.
At 100 valor, generate 5 mana per turn.
How about extra mana at 25, +1 defense all at next level, then +2 strength? It's more straight forward attack based