EDIT – I changed the decklist to match the one I used in the Holiday Vintage Festival final, where I took 2nd out of 130-ish players (losing to LSV in the finals). The tweaks from before were to take out 2 Time Spirals, Brainstorm, and a Time Walk for a Mystical Tutor, the 4th Grim Monolith, and 2 Tezzerets. The Tezzerets were definitely better than Spirals. (I also put 2 Workshops in the board, which helped me win the one match I played vs ‘Shops, but I had to activate Belcher twice since I had a land in my deck.)

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Here is the decklist for the Mono-Blue Goblin Charbelcher deck I used against Kai, and used to qualify for the Vintage Holiday Festival championship:

1 Ancestral Recall
1 Black Lotus
1 Mox Emerald
1 Mox Jet
1 Mox Pearl
1 Mox Ruby
1 Mox Sapphire
1 Timetwister
3 Chrome Mox
4 Mox Opal
1 Tolarian Academy
4 Force of Will
4 Gitaxian Probe
1 Mind’s Desire
4 Preordain
1 Tinker
4 Expedition Map
4 Goblin Charbelcher
4 Grim Monolith
1 Lion’s Eye Diamond
1 Mana Crypt
1 Mana Vault
1 Memory Jar
2 Voltaic Key
1 Ponder
1 Time Vault
1 Lotus Petal
1 Sol Ring
1 Windfall
3 Pact of Negation
2 Tezzeret the Seeker
1 Time Spiral
1 Mystical Tutor

1 Void Snare
3 Mental Misstep
2 Mindbreak Trap
2 Defense Grid
2 Mishra’s Workshop
4 Leyline of Anticipation
1 Hurkyl’s Recall

It’s possible that I should have more mana (the 4th Chrome Mox, the 4th Grim Monolith, and/or the 3rd Voltaic Key) as it’s felt a little tight lately, but I really like having 3 Pacts. Maybe I have too much expensive card drawing? Also – sideboard out Windfall on the draw.

Leyline of Anticipation is the plan when on the draw against Shops as you literally cannot cast a spell if they go first and play any sort of Sphere effect. Don’t play this deck if you think you’re likely to run into ‘Shops, but I think it’s pretty good against blue decks, especially permission-light ones (like Delver).

Enjoy!