I like the gimmick, but overall it's a pretty bad spear compared even to other uniques and severly outclassed by crafted spears like the rest of them.
By far the nicest thing about is the highest block value out of all uniques, but that's not really enough.
Total damage is somewhat high, but since it's dealt in 3 separate instances, it will be VERY susceptible to blocking, especially when combined with DT. Which is a really big deal, because spears are otherwise the second best melee weapon at going through blocking.
The main gimmick, 3 poisons applied at once, is nice but doesn't really have that much use. The best case for it is stacking leper poison fast, or some heartbreaker shenanigans with sweep. The latter especially could be fun, but not particularly strong. I like it though.
Otherwise it's a regular spear. Base AP cost, crit chance, crit damage. 100% crit damage is especially bad here, since it has no energy edge/electroshock and is going to be much more easily resisted by enemies because of the damage split. Long story short, this is going to struggle for damage the most out of all spears, that already struggle at dealing high damage as a weapon type to begin with. Pretty bad. Compare to crafted tungsten that has both single instance damage, energy edge/electroshock AND 120% crit damage at the same AP cost. Even Lemurian Spear at least has the plasma emitter while glaive has high damage sweeps. Trident gets nothing in this department.
My suggestion - add three 25% chances to bleed for 50% of total damage for 3 turns. Change the description to say all three prongs are serrated. This would be both reasonably strong without being overpowered and unique among spears. So far the only spear that can bleed at all is the Skærder Spear, one 25% chance for 150% damage. It also has 130% crit damage, which combined honestly kinda makes it looks better than the Trident. Other than that, all spears lack the ability to bleed. This would make Trident into the best option for spear builds that want to make use of Taste for Blood, plus it would go nicely with any spear build that attempts to make use of the 3 poison mechanic for heartbreaker poison. This could be the dedicated damage over time spear. Sounds fun and would go a long way to solve its inherent damage problems.
