Playing against discard strategies and watching your hand of cool cards slowly bleed away is frustrating enough, but watching those cards go to your opponents boards, for free
Second, this card costs 5 mana
Armory Mice Arthur, Marigold Knight Brambleguard Captain Brave-Kin Duo Canyon Jerboa Cheeky House-Mouse Emberheart Challenger Flowerfoot Swordmaster Heartfire Hero Mabel, Heir to Cragflame Manifold Mouse Mouse Trapper Nettle Guard Pests of Honor Raging Battle Mouse Roughshod Duo Seedglaive Mentor Stampeding Scurryfoot Steelburr Champion Thistledown Players Tusk and Whiskers Veteran Guardmouse Whiskerquill Scribe Whiskervale Forerunner
Thalia, Heretic Cathar is good for one training trigger while also making it tough for opponents to cast effective blockers
Sand Golem Rarity: Uncommon TYPE: Artifact Creature SUBTYPE: Golem CMC: 5 Mana cost: USD: $0.19 EUR: 0.17 TIX: 0.04 EDHREC RANK: 30893 (3/3) When a spell or ability an opponent controls causes you to discard this card, return this card from your graveyard to the battlefield with a +1/+1 counter on it at the beginning of the next end step
I mean, I think it would be really fun to troll my friends with a 1996 World Champion as my commander