Current Version can be found here.
Explosion is one of the only cards that had its image changed, which was done in Beta 7.4. However, while the old card doesn't say that it's only usable on enemy monsters, its effect never changed, so the description was updated for clarification.
Beta 9.3 buffed it by decreasing its cost from 7G to 6G.
SOUL Type: Justice
- 7 (Pre Beta 9.3)
- 6 (Post Beta 9.3, Current)
Effect: Deal 2 damage to an enemy monster and 4 damage to adjacent ones.
Rarity: Blue (Rare)