First printed in Assassin's Creed (2024)
Assassin Den 
Creature — Wall
Defender (This creature can't attack.): Put a +1/+1 counter on target creature you control. It can't be blocked this turn. Activate only as a sorcery.
Legality
- Legal in
- Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker
- Not legal in
- Standard, Pioneer, Pauper, Future Standard, Historic, Timeless, Alchemy, Penny Dreadful, Premodern, Old School 93/94, Gladiator, Pauper Commander, PreDH, Tiny Leaders, Brawl, Standard Brawl, Competitive Brawl
MTGO price: 0.01 TIX, the cheapest non-foil print (average sell price on GoatBots, 28 Oct 2026).
Combos
6 combos from Commander Spellbook, the most popular first.
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Biomancer's Familiar + Training Grounds
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Biomancer's Familiar + Heartstone
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Heartstone + Training Grounds
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Training Grounds + Zirda, the Dawnwaker
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Heartstone + Zirda, the Dawnwaker
- Infinite +1/+1 counters on a creature: Assassin Den + Berta, Wise Extrapolator + Biomancer's Familiar + Zirda, the Dawnwaker