Get 40 reds and 10 blues. Put four groups of ten reds on the following strategic locations (on the balcony in front of the beast; down the stairs on the left side of the beast; behind the beast; on the right side of the beast). Drag around your blues to prevent the spread of the slime. Do this while standing to the right of the stairs. By doing this you can get to Solarius quickly when he is regurgitated by the beast to drain him with your evil presence spell.
