Repro:
1. Pick Earth Spirit and level up Rolling Boulder
2. Create an enemy Rubick and level up Spell Steal
3. Use Rolling Boulder and steal it with Rubick
4. Place multiple stone remnants in a line
5. Also create an allied Templar Assassin, level up Psionic Trap and place some traps next to the remnants
5. Cast Rolling Boulder with Rubick so that it hits all remnants and traps

Result: All remnants and traps the Rubick hits get destroyed by Rolling Boulder. The first one Remnant boosts it and does not count as a last hit. The other remnants and traps do not boost and count as last hits.

Expected: Only the first hit remnant gets destroyed, which then boost the roll. All other remnants are unharmed. Psionic Traps should not be destroyed at all