Ram. Melee Attack Roll: +5, reach 5 ft. Hit: 6 (1d6 + 3) Bludgeoning damage. If the target is a Large or smaller creature and the elk moved 20+ feet straight toward it immediately before the hit, the target takes an extra 3 (1d6) 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.