This deck isnt the best at attacking, but the decks youre targeting with Drill Bit (Bant Golos, Fires of Invention builds, Doom Foretold) are even worse at blocking, so Drill Bit still costs one mana most of the time
Most often if you're ahead in the game you'll head left in the Dungeon and be aggressive, while going right helps you cast better spells thanks to the Treasure token and can shut down an attacker for a turn
Krrik, Son of Yawgmoth, which is a card that is on the borderline of being unhealthy for the format, makes a great deal of sense in this deck
#80 Slowbro
This isnt an ideal world, though, so its very hard to focus on the positives of this latest MTG set when theyre accompanied by major caveats
Any "as [this permanent] enters" or "[this permanent] enters with" abilities of the copied creature will also work