Also it has to be revealed before the upkeep, meaning you wont see the result of the burn roll.
I like the mana cost of it, but the spellpoint cost is probaly too steep for the priest who really could use such a card.
What prevents this from being revealed after you roll the burns?
Not sure if using a Mage's action to cast this is worth it, however it's a nice use of action for Syserix or whatever his name is. Then you can bring the Fireball pain on subsequent rounds.
Sectarus is another option for using it, though the Familiar method might have more synergy because of leaving the hand free for LoH.
Also this is a seriously nasty card.
Maybe even worth taking as as a Priest, since it unbounds the damage from burns!
Average damage before: 3/2 * Sum(n=1 to T) (2/3)^n
Average damage now: T [average mana cost = (9+T)/3]
With T = number of turns
I think it's very nice card for Burn builds!
If i remember correctly, Bryan said that Burn does average 2 damage before dissapearing (or 1?).
Can someone calculate damage increase after few rounds with few Burns, when does it pay off? My head doesnt work today...
It depends on how long a period you consider. If you say T=infinity it goes to 3.
If you expand the first several turns out from the series:
1 + 2/3 + 4/9 + 8/27 + 16/81 + 32/243 + 64/729 + 128/2187 + 256/6561 + 512/19683...
~= 1 + .67 + .44 + .30 + .20 + .13 + .09 + .06 + .04 + .03...
So: (approximately)
1: 1
2: 1.67
3: 2.11
4: 2.41
5: 2.61
6: 2.74
7: 2.83
8: 2.89
9: 2.93
10: 2.96