Dimir Control leans on cheap removal like Snuff Out and Cast Down alongside a wall of small blue tempo creatures like Spellstutter Sprite and Faerie Seer, so we want resilient threats and a way to answer their token swarm. Nylea's Disciple provides a solid body and lifegain off our devotion to blunt their Ninjutsu and Ninja damage plan. Breath Weapon deals 2 damage to each non-Dragon creature, sweeping their 1-toughness Faeries and Faerie Seer. Rancor is a poor investment into a deck full of cheap removal that can two-for-one us.