Conjure Viper

5th-level conjuration

Casting Time: 1 action

Range: 60 ft.

Components: V, S, M* (an ouroboros symbol on a piece of parchment and snake fangs)

Duration: Concentration, up to 1 minute

You summon a fiend in the form of a viper that appears in an unoccupied space within 5 feet of you, whose initiative is directly after yours. You can use a bonus action to command this snake to go bite a creature within 60 feet of your location.

A creature that did not see or hear you cast this spell must succeed on a Perception (Wisdom) check against your spell save DC in order to be aware of the viper, who slithers soundlessly toward them.

The viper has a movement speed of 30 feet and cannot take the Dash action. It has an AC of 18 and has 10 HP. When the snake is within 5 feet of the targeted creature, it uses its reaction to take the bite attack with a +10 attack modifier.

If it hits, the creature takes 1d8 piercing damage, and must make a Wisdom saving throw against your spell save DC. If the creature fails, it takes 4D10 necrotic damage.

The conjured vipers lasts until the spell ends or it drops to 0 HP.