Deus Ex Primus

The righteous order and fury of Mechanus fuels your soul. Choose 2 creatures within 30 feet and make ranged spell attacks against them. On a hit, a beam of golden light shoots from your palms and connects with the targets, burning into their being. The targets take 3d12 radiant damage, and on each of your turns for the duration, you can use your action to deal 2d12 radiant damage to these targets automatically. The beam continues against said target until you use your action to do anything else, they move out of it's range or take total cover.

Alternatively, you can choose one target within 60 feet of you and fire a concentrated beam from your chest which deals 5d12 initial radiant damage and 3d12 afterwards for each turn.