Ram. Melee Attack Roll: +6, reach 10 ft. Hit: 11 (2d6 + 4) Bludgeoning damage plus 5 (2d4) Radiant damage. If the target is a Huge or smaller creature and the elk moved 20+ feet straight toward it immediately before the hit, the target takes an extra 5 (2d4) Bludgeoning damage and has the Prone condition.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.