Vatnavaettir are horses made out of water. Once you touch them you are stuck to them, dragged into the water, and drowned.
Magnus Chase and the Gods of Asgard
The Ship of the Dead
While the crew of the Big Banana dock in York, they split into two groups. Magnus Chase, Alex Fierro and Thomas Jefferson Jr. head into town while Samirah al-Abbas, Mallory Keen and Halfborn Gunderson guard the ship from the creatures.
After Magnus defeated Loki in Flyting, the crew escaped using one of the Vatnavaettir Sam actually befriended.
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