Jeskai Ephemerate loops Mulldrifter and Augur of Bolas with Ephemerate for repeated card advantage and blockers, backed by Counterspell, Dispel, and Skred for removal/control, so Tragic Slip is efficient removal that dodges their counterspells by being cheap and can two-for-one a blinked creature before it re-triggers. Troublemaker Ouphe adds pressure and can punish Bender's Waterskin or other artifact-based value they lean on. Cut slower filtering like Heaped Harvest and Ichor Wellspring since you want to apply consistent pressure rather than grind — their Ephemerate loops out-value a slow attrition plan. Watch for Skred scaling with Snow lands as removal for Troll of Khazad-dum, and try to play your threats when they're tapped out from Ephemerate value turns.