Call the Ancients is notoriously difficult to build around. So here's a Chalice deck with a splash of Fire and a bunch of ancient Titans. What do we have to lose?
Normally this would be a bottom of the barrel meme deck, but this one is at least good enough to reliably get you through Gauntlet runs.
The idea is to play CtA and Chalice and start drawing cards like crazy until you bump into some Titans. Waker of Ancients works well with both CtA and Chalice so she's a must-have in the market.
There's a little bit of everything so you always have some counter to your opponent's play. Kaleb's Intervention is excellent in all circumstances. Feel free to add a third copy against an armory meta.
This deck can run into a wall when dealing with decks that summon big units, especially with Praxis decks. In that case you must rely on transformation spells and Warp cards to even the odds.
Please give some feedback if you like the concept and want to improve it :)