Sword of Hours 61 (Commander: Adventures in the Forgotten Realms)

Whenever equipped creature attacks, put a +1/+1 counter on it. Whenever equipped creature deals combat damage, roll a d12. If the result is greater than the damage dealt or the result is 12, double the number of +1/+1 counters on that creature. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

NM - $11.00
LP - $8.80
MP - $6.60
HP - $4.40
DMG - $2.20