5 spindown dice to use as life counters, token counters, lore counters, poison or toxic counters, or whatever else you need to keep track of in your game: 1 x d20,2 x d10, 2 x d6
Lastly, red is the color of goblins and goblin tokens, so we'd be remiss if we didn't at least mention Skullclamp
Though not technically rabbits, I'm also going to take a look at some commanders that might be helpful to run as commanders in a rabbit-themed deck
Getting free loyalty for every artifact that enters, including tokens, is the craziest of all
A bit that caught my eye at the last minute was that its type is Assembly-Worker, meaning you can go find it with Self-Assembler and buff it with Mishras Factory
Palinchron (GD, Urza's Legacy) Shivan Dragon (GD, Seventh Edition) Blood Crypt (LP, Dissension) Blood Crypt (PL, Dissension) Stomping Ground (GD, Guildpact) Stomping Ground (LP, Guildpact) Mox Diamond (NM, From The Vault: Relics) Intuition (EX, Judge Reward Promo) Imperial Seal (NM, Judge Reward Promo) Liliana of the Veil (NM, Ultimate Masters) Tarmogoyf (GD, Future Sight) Sliver Overlord (GD, Scourge) Teferi, Hero of Dominaria (NM, Guilds of Ravnica: Mythic Edition) Scalding Tarn (NM, Zendikar Expedition) Wasteland (EX, Player Reward Promos) Wasteland (GD, Player Reward Promos) You Know What Time It Is: Dual Land Time That's right, it's that time of the New Arrivals Drop