44e3c604__3___Game_Guide___Jellyneo_net__Strategy
[Name of Boulder] Undo Block [Use of Block] Undoes last move made only if last move did not involve Power-Up Block [Strategy] 
Overall this isn't an extremely useful tile, but it can help if you make a big mistake such as breaking up a huge combo.
Destruct-O-Match 3 | Game Guide | Jellyneo.net
Strategy