This route is tricky, with two distinct cruxes that keep you fighting to the anchors. To get there, do the first pitch of Beta Sponge (10a) to the belay ledge. Then traverse right about 20 feet across the ledge to the base of T-zilla, Rap Drilla. This is the farthest right line on digital tower. Move your belay over here.
The first crux is maybe 12b, involving a series of slightly overhanging moves, culminating in a big reach out of a slopey granite hueco. The second crux is a 10 foot section of 12c micro edging and pebble tweaking.
The only drawback to the line is a section of 8-10 feet of chossy stone near the start - just grit your teeth and put up with this, as the climbing above is outstanding.