pokemon mega japanese booster box Dream ex M2a (Japanese) [US Seller] – MHDEALSPLUS with at least one guaranteed Pokémon ex or Mega Evolution ex per pack Pokémon Mega Symphonia M1S Booster

Diligent Excavator is a card you could build around to enable those cards though

Sort Card Type Kingler #38Uncommon $1.09 Kingler #26Rare $1.96 Kingler #20Rare $2.05 Kingler #14Uncommon $0.43 Kingler #47Rare $0.43 Kingler #44Uncommon $0.18 Kingler #99Uncommon $0.20 Kingler #99Uncommon $0.13 Kingler #13Common $0.52 Kingler #26Uncommon $0.51 Kingler #14Uncommon $2.00 Kingler (15) #15Holo Rare $56.82 Kingler (50) #50Rare $7.90 Kingler (Delta Species) #22Rare $5.92 Kingler (Master Ball Pattern) #99Uncommon $10.34 Kingler (Poke Ball Pattern) #99Uncommon $0.73 Kingler V #28Ultra Rare $1.00 Kingler VMAX #29Ultra Rare $1.95 Kingler (15) #15Holo Rare $56.82 Kingler (Master Ball Pattern) #99Uncommon $10.34 Kingler (50) #50Rare $7.90 Kingler (Delta Species) #22Rare $5.92 Kingler #20Rare $2.05 Kingler #14Uncommon $2.00 Kingler #26Rare $1.96 Kingler VMAX #29Ultra Rare $1.95 Kingler #38Uncommon $1.09 Kingler V #28Ultra Rare $1.00

Once you have enough mana, you can flicker Garth a few more times to create a Braingeyser for each opponent

9 Pokmon ex

You could also include gold star cards in there if you determine that the star is a shiny indicator