Because of the price of Gengar VMax, booster boxes of "Fusion Strike" cost over $400
LP copies will offer a solid discount, clocking in closer to the $16 mark if you're not interested in collecting a perfect copy
That card text effect means that the Cannonholder has to sacrifice one of his allies to actually deal damage with the cannon, so I guess it's either tragic misfiring, or the Cannonholder just shoves his allies into the cannon and launches them at the enemy
On the Link front, we have two copies of "Reptilianne Echidna" for the aforementioned reason, two copies of "Alien Shocktrooper M-Frame" as a powerful A-counter spreader and basically a Reptile "Soul Charge" on legs, two copies of "Cosmic Slicer Zer'oll" for all the amazing effects it provides, one copy each of "Knightmare Phoenix" and "Knightmare Cerberus" for removal and one copy of "Borrelsword Dragon" if you want to throw the strategy out the window and just kick with a Link-4 beater
Mana abilities that don't include thesymbol and instead say "Tap an untapped creature you control" or similar won't cause Badgermole Cub's second ability to trigger