Ram Rune

Hold down and jump while airborne and you drop hard, hitting everything around you on landing. Falling further before you commit turns it into a stronger version with more reach, so the move rewards gaining height first instead of slamming the moment you leave the ground. Landing directly on an enemy adds a separate hit and a sliver of invincibility, which is enough to punch through a body you would otherwise have bounced off.

The downward acceleration is the part worth keeping. You fall faster than any wing allows and take no fall damage doing it, which makes vertical dodging a real option long before you own proper mobility gear. With a Gravitation Potion running it becomes a way to cross an arena at speed in either direction, and it is one of the cleaner answers to fighting Duke Fishron early, since his charges are easiest to slip when you can drop out of the lane instantly.

It does nothing while you are on a mount. The shockwave damage is fixed and will never grow, and only the direct contact hit scales at all, and then only with summon damage, so a melee build gets the same numbers at the end of the game as at the start.