The Grimoire is operated by DiceBard.com, Dice Bard has everything you need to play 5e... as long as all you need to play 5e is dice.

Maelstrom 5th-level evocation

Casting Time: 1 action

Range: 120 feet

Components: V, S, M (paper or leaf in the shape of a funnel)

Duration: Concentration, up to 1 minute

Tags: druid level5 evocation

A swirling mass of 5-foot—deep water appears in a 30-foot radius centered on a point you can see within range. The point must be on the ground or in a body of water. Until the spell ends, that area is difficult terrain, and any creature that starts its turn there must succeed on a Strength saving throw or take 6d6 bludgeoning damage and be pulled 10 feet toward the center.

You can find more information on this spell in: XGTE.160