2nd and 3rd normal attack strike in the combo slams the ground and inflicts AoE damage. The 5th also hits the ground behind you, to the right. This can be used to stunlock certain enemies such as Infested Chargers or simply add elemental procs such as Cold or Heat, similar to the Fragor.
Highly recommended to use a Warframe that has the ability to stealth (e.g. Loki) or way to lower/ignore damage (e.g. Rhino) due to the long attack animations and the possibility to get interrupted easily and the extra damage output dealt to enemies. Also, a Shade with Ghost equipped, can be quite convenient as well.
In the Arthurian Legends, 'Galatine' is the name of the sword given to Sir Gawain by the lady of the lake. It is referred to as 'Shadow to Excalibur's light'.
It resembles the Power Sword from He-Man. This was acknowledged by DE in the redtext before the update.
Upon deploying the hotfix, the redtext feed from DE described the Galatine as "a sword so big your friends might think you're overcompensating for something, while secretly they know you are not."
Despite being considered as an Axe-type weapon alongside the Scindo and the Gram, the Galatine uses sword animations for its stealth attack and counterattack finishers instead. This also refers to the fact that the Galatine is a greatsword while being classified as an Axe.
The icon displayed shows the Galatine with red energy, but the default energy color is the standard Tenno energy blue.