My suggestions:
Take off the poison, have ability damage the sprite each time it is used (like it is giving up its magical life essence... or something).
That's a really good idea. It makes more sense thematically and it still synergizes well with cards like Purify, Armor, and Guardian Angel and gives cards like Thunderstorm and Plague a bump.
That also makes the card more powerful, though. I'm hesitant to drop the activation to three. On one hand, when I compare Sprite to BE:
- at an activation cost of three, Sprite would be the same as BE.
- BE advantages: you can activate BE first turn, put BE on something sturdy like an Armadilgo, and BE'd critters don't take damage like Sprite.
- Sprite advantages: lower card cost of Sprite and more importantly not needing two cards.
But then on the other hand I compare it to SoF:
- Unaltered SoF kills three perms before dying, unaltered Sprite gets two.
- It’s easier to alter Sprite and give it more PC (through increasing Sprites current or max hp).
- Upped Sprite does a little damage
- SoF costs only 6 colorless
- SoF gives a Black Hole.
Ultimately if I compare to BE I feel like four activation is probably right and if I compare to SoF I feel like three is definitely right. Conclusion: SoF is OP.
I'll make it three for the time being but more feedback is appreciated.
Note: I could go three activation and bump card cost up from one, but I don’t want to.