Vhalkretta Rainbow Hyper Beam

A rainbow like beam blast up from the Warlocks weapon that has been infused with the Rainbow colored orb. The caster may then chose a straight line and all creatures must succeed a dc 21 dex saving through or suffer 6D12 damage. The caster may expend extra orb charges to increase this attacks damage by 1d6 ( One additional hit dice per orb charge spent). This spell may be used as a reaction to other evocations slicing through your opponents spell. This spell is immune to counter spell and dispel magic and can only be nullified by V.2 or V.3 of this spell.