In theory, the death of the Eldrazi should have stilled the Roil. It did not.

Foundations

Into the Roil

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.)
Return target nonland permanent to its owner's hand. If this spell was kicked, draw a card.

"Roil tide! Roil tide! Tie yourselves down!"

Commander Legends

Zendikar Rising

Commander 2018

Commander 2017

Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.)
Return target nonland permanent to its owner's hand. If Into the Roil was kicked, draw a card.