I know its Standard-legal, but its very clearly aimed at EDH
Flavor Text Wir hatten Jahre, uns vorzubereiten sie lediglich Minuten." Kerrick, Geheimagent Set Number 95 Language Deutsch Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (12/8/2022) No Mercy's ability triggers whenever any creature, including creatures you control, deals damage to you, not only combat damage.
The Set: An Overview Duskmourn: House of Horror comes with all the essentials
Is BCFoCCF considered tapped
On the flip side, since your deck is so heavily creatures, that means you have fewer noncreature cards than normal and potentially less resilience to effects like board sweepers