xanathar mtg commander deck Sell-Sword Brute (4) Ravnica City of Guilds NM Magic the Gathering Sell Your MTG Collection and

You could build the deck around just one, but a mixture of a few will make your deck stand up better against different commander players

Im not Canadian-based and Ive never had to buy Magic cards in Canada, so its difficult for me to recommend a specific place to buy from

Hydras usually appear at rare and are at least Limited bomb tier with a lot of them seeing Constructed play

Gaeas Cradle Gaea's Cradle and Serra's Sanctum generate so much extra mana for a single land drop that its no surprise they made the Game Changers list, especially in a format thats moving away from mass land destruction (and even targeted land destruction)

Whats nice is that this should be very good in just one deck while no other deck will be particularly interested, so you should be able to pick it up whenever you need

It's a win-win: you mess up their plans and trigger all your cards that combo off discards