While Terra can take some work to make her truly effective, the precon already offers an excellent start with some incredibly powerful combos and consistent value returns
Henzie Toolbox Torre Give me a reason to run big creatures and Im there
This is especially true for Golbez, Crystal Collector, who looks pretty powerful, not to mention iconic
Promos are cards from the main sets, but with different stamps, foiling, art, and borders
Assuming you do a little bit of setup (easily achieved with access to greens ramp and blacks tutors), you can have some protection spells ready with Swiftfoot Boots, some Impact Tremors-like effects, and some sacrifice synergies like Blood Artist and Mayhem Devil to maximize the damage those Kobolds deal on the way in and on the way out
(You expend 4 as you spend your fourth total mana to cast spells during a turn.) Brambleguard Veteran's ability affects only Raccoons you control at the time it resolves, including Brambleguard Veteran itself (as long as it's still a Raccoon at that time)