This bomb looks like a battlebot except that the shape is half of a sphere instead of having other things attacked to it and not being perfectly round like a battlebot. It doesn't have any eyes. As soon as you place it, it starts to slowly open up like when the battlebot opens up. When the blast radius circle fills up, at the same time, the bomb fully opens and attacks. I don't have any idea for an attack and would like you guys to suggest some ideas. After the attack, the bomb blows up with the blast size of a blastcube. The blast is not the main part of the bomb, it is the first attack.

Please suggest ideas for the first attack and criticisms.

Added later: I have come up with an idea for the first attack. It is where the bomb fires explosions that radiate outwards in 8 directions, it is the same as how the explosions of the brandish line charge attack work. the explosion colour is same as the warmaster's rocket hammer's explosion and causes no status effects. also, the explosion does not have a column of energy like the 5* charge explosion of the brandish lines. These consists of 3 explosion for 3* 4 for 4* and 5 for 5*. I have not thought about the amount of damage it deals.