What Sleek Stroke Does
Sleek Stroke is Swim Speed +30% — the entry tier of the swimming family below
Ace Swimmer
(+40%) and
King of the Waves
(+50%). It only affects movement through water, so it's
strictly for swimming mounts; on anything else the slot is wasted.
On an actual water mount the family stacks: all three tiers together are +120% swim speed, which turns ocean crossings from a chore into a commute.
How to Get It
Sleek Stroke is one of the default options at the
Pal Surgery Table
— no implant needed,
10,000 gold per surgery. It also rolls on wild Pals like any common passive. See the
implants guide for how surgery works.