The next Japanese High Class Pack set, SV8a Scarlet & Violet Terastal Festival
Most cards (typically five to six) within a single booster pack are Common cards, so youll run into them fairly often
So if you can keep your commander in play you get benefits from your backgrounds, plus the powerful effects from cards like Skyhunter Strike Force for a massive melee, Tyrant's Familiar to burn off creatures, and Thunderfoot Baloth to finish opponents with a permanent, only slightly smaller Overrun
With a lot riding on Historic, it makes sense for Wizards of the Coast to be highly-attuned to player desires, especially pre-launch - a healthy Historic format could create long-term investment in the MTG Arena platform that wouldn't have been possible with just rotating Standard formats, and it could spill over into paper Magic: The Gathering should it prove popular enough, too
So youre gaining a lot of value from Koby attacking, removing a low-power blocker or a power-reduced Character, and gaining resources, which might force the opposing player to burn resources trying to remove Koby from play