Gumble passive ability revamp [bounty: 100 XTR]

[DreadKnight]

Gumble's current passive ability is rather silly atm, since he's a lvl one unit (usually meant as support, utility or glass cannon in some cases) and doesn't have a lot of hitpoints or tanky stats, so it should get revamped.

Current ability:

title: 'Gooey Body',
desc: 'Receives bonus pierce, slash and crush masteries based on remaining health.',
info: '3 bonus points each for every 7 health.',
upgrade: 'Health threshold becomes 5.',

Revamped ability:

title: 'Gooey Body',
desc: 'When killed, it melts into a puddle that traps any unit that walks on top of it.',
info: 'Can't move current round while on goo.',
upgrade: 'Does not affect allied units.',

Details:
Affected units walking over get pinned into place, not able to move current round. Can use abilities just fine. Using movement related abilities can free the unit if landing to a new location outside of the goo, allowing to use remaining movement points. If a unit starts turn on top of the goo, it can move away, but stepping on the goo again will cause the unit to get pinned again; this can happen for medium and large units as well if trying to step through it, having rest of the body walk on the goo again. The goo remains on the combat location until overlapped by some other similar trap.
Impaler's Poisonous Vine won't cause the goo to vanish, as it should be consider a debuff rather, might need patching.

Sprite file:

Location:
AncientBeast/assets/autoload/phaser/units/sprites/trap_goey-body.png

Related:
#2547

[aybanda]

would like to work on this issue @DreadKnight
could you please assign this to me?

[DreadKnight]

would like to work on this issue @DreadKnight
could you please assign this to me?

@aybanda Sure thing. Assigning right away. 2 weeks soft deadline 🐻