What exactly is 'power' on a hero's card?

[DaveCozy]

It’s a number representing the combined total of rarity (stars) + stats + special skill level + talent tree nodes.

I’ll refer you to read this topic if you want to exactly know how the game calculates card power:

CP Calculation

Note: “CP” = Card Power I’ve worked out the exact CP formula. Each card has a base CP when stats are all 0. That value is: 1* Base CP: 0 2* Base CP: 10 3* Base CP: 30 4* Base CP: 50 5* Base CP: 90 Specials are worth 5 extra CP for each level after the first Talent tree nodes are worth a flat 5 CP each, and stat increases from talent tree nodes don’t have a direct effect on CP (so whether the node gives you 15 Attack or 45 Attack, it’s still 5 CP). See the discussion in posts below fo…