OIL BOX BOOM!

Mystery Box + oil: a box opened in an oily hole explodes 5x5.
How to find it, step by step
- Get MYSTERY BOX and OIL SLICK in the same run (prizes come from the prize screen at every arc; moles from drafts).
- Make them meet as described at the top of this page (the order does not matter).
- A sparkle and a ring mark the spot, the ticker shows the interaction's name and the effect fires a moment later. That counts.
Reward
A 5x5 explosion.
Tips
In-game hint
Some prizes get along better than others.