You could do worse than a cheap loot ability
Bring in your Four Leyline against Hogaak and Uro
Obvious ideas would be exchanging most of the expensive vampires in exchange for cheaper and (only slightly in some situations) weaker ones and consider getting creatures that aren't vampires, getting more spells in exchange for creatures could be good too, (I might have stuck with the whole vampire theme a little too much here) But after all that I'm still stoked to play it just need to add a bit of power to it.
Thieving Skydiver can be played for as little as two mana and it has flying, making it the perfect candidate for this tactic
It is particularly effective in decks with Flaaffy or Miraidon ex, since they can quickly power up the energy needed to start swinging for huge knockouts
No matter which Mini Tin you select, youll find two Crown Zenith booster packs, a sticker sheet, and an art card showing the Mini Tins art inside