Blast

Elemental Blast
Greensteel T3: 1d10 * (critical multiplier -1) on Critical, + 4d6 on Vorpal
 * 2x multiplier = 1d10 on Critical, + 4d6 on Vorpal
 * 3x multiplier = 2d10 on Critical, + 4d6 on Vorpal
 * 4x multiplier = 3d10 on Critical, + 4d6 on Vorpal

Source