mtg growing threat commander deck Upgrade - Improving the Precon with $100 with the exception of basic lands Magic: The Gathering March of

Re-locking Rooms is less useful but can work well with some of the cheaper ones like Roaring Furnace

Byrke, Long Ear of the Law (BLB) $25.60 Byrke, Long Ear of the Law is one of a recent spate of +1/+1 counters cards printed into Standard recently

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The ETB effect only works on permanents that aren't two colors, while the effect on the artifact creature on the back face rewards you for playing two-color cards

Vampires Vengeance Fiery Cannonade getting an upgrade like this should be a very useful card to have around in Standard