With all of the comments, working change for the idea:
Each time a creature(s) takes damage, this card gains a charge.
: Energize (Sacrifice Card)
Target creature gains +X/0, where X is equal to the number of charges on this card.
The difference is that it treats any damage as a lump sum, so no matter how many enemies die because of a single spell, it's still only treated as creatures taking damage at once. The same thing applies to poison, where it's treated as a lump sum.
The other option is, as it's been mentioned, change the X from the number of charges to charges/2 or /3, or something similar.
With that in mind...
of the following list, what are considered as 'damage'?
- direct spell damage (fire bolt, ice bolt, shockwave, thunder, thunderstorm, RoF ...)
- poison damge
- physical attacks directed to monsters by gravity pull
- instant death (devour, inundation, etc)
generally, u need to be more specific.
also, by saying 'a creature takes damage', you mean both friendly and hostile creatures?
if so, then, as others above mentioned, the card is OP since plague/thunderstorm etc. will make this card go nuts.
I'm counting any instant damage spells as "damage", so poison doesn't count, gravity pull doesn't count, and instant kills don't count. I'll make a note of the types, though I didn't think it was that confusing altogether.
I like the idea but maybe every 3/5 charges is +1/0 or something.
It's definitely one of the things that's up for consideration.
Aflatoxin + thunderstorm = 23 damage
A bit op if you ask me.
Still messing with the above ideas.
This card would be a bit OP if mass creature control is used. Therefore, I suggest it being "Every time a creature is targeted by a card and takes damage" or something along those lines. But if that was the case, it might be a bit UP, so maybe if it doesn't sacrifice itself?
That's what the upgraded version does. Targeting's another idea, so if the above changes aren't good, I'll try that as well.