Enhance Ability

You touch a creature and bestow upon it a magical enhancement. Choose one of the following effects; the target gains the effect until the spell ends.

Bear’s Endurance. The target has advantage on Constitution checks, based roles, and saves. It also gains 2d6 temporary hit points, which are lost when the spell ends.
Bull’s Strength. The target has advantage on Strength checks, based roles, and saves, and their carrying capacity doubles.
Cat’s Grace. The target has advantage on Dexterity checks, based roles, and saves. It also doesn’t take damage from falling 20 feet or less if it isn’t incapacitated.
Eagle’s Splendor. The target has advantage on Charisma checks, based roles, and saves.
Fox’s Cunning. The target has advantage on Intelligence checks, based roles, and saves.
Owl’s Wisdom. The target has advantage on Wisdom checks, based roles, and saves.

At Higher Levels
When you cast this spell using a spell slot of 3rd level or higher, you can choose to either target one additional creature for each slot level above 2nd or increase the duration of the spell to be 4 times the spell slot level being used.

Effect

The touched creature's ability is enhanced for the duration of the spell.

Manifestation

A momentary flash of light and tingling feeling to the creature receiving the enhancement.

Source

Player's Handbook, online at DnD 5e Wiki - Spells - Enhance Ability

Difference from 5e

Source: Player's Handbook
2nd-level transmutation
Casting Time: 1 action
Range: touch
Components: V, S, M (fur or a feather from a beast)
Duration: ~~Concentration, up to~~ 1 hour
You touch a creature and bestow upon it a magical enhancement. Choose one of the following effects; the target gains the effect until the spell ends.

Bear’s Endurance. The target has advantage on Constitution checks, based roles, and saves. It also gains 2d6 temporary hit points, which are lost when the spell ends.
Bull’s Strength. The target has advantage on Strength checks, based roles, and saves, and their carrying capacity doubles.
Cat’s Grace. The target has advantage on Dexterity checks, based roles, and saves. It also doesn’t take damage from falling 20 feet or less if it isn’t incapacitated.
Eagle’s Splendor. The target has advantage on Charisma checks, based roles, and saves.
Fox’s Cunning. The target has advantage on Intelligence checks, based roles, and saves.
Owl’s Wisdom. The target has advantage on Wisdom checks, based roles, and saves.