This has been my suggestion for quite some time

Bole: When drawn the target player receives 10% reduced damage for 15 seconds
Balance: Target player receives 5% increase damage boost for 15 seconds
Spear: Target player receives 10% crit buff for 20 seconds
Arrow: Target player receives 10% increased weaponskill, cast time reduction 20 seconds
Spire: Player Receives Direct hit increase of 10% for 20 seconds
Ewer: MP Refresh potency of 30 for 10 seconds

Balance is nerfed and other cards provide buffs, reflect lore without being over the top