A quick search turned up a promising open-source project (mtgrender Describe the world, key factions, prominent creature types, mechanical themes, potential synergies, and supported play styles
Gravekeeper's Servant X SPELL Continuous Unless your opponent sends 1 card from the top of his/her Deck to the Graveyard, he/she cannot declare an attack
Both have been recently reprinted, and neither ended up getting used
Madolche Promenade X TRAP Target 1 face-up card your opponent controls and 1 "Madolche" monster you control or in your GY
The problem is that if the game drags on, this deck, which has weak defenses, will have its life depleted, so you need to include plenty of life-gain mechanics like Al Bhed Salvager