How do you get a harvester's scythe?
Harvester's Scythe: increased critical hit chance, critical hits heal you. To unlock: complete a Prismatic Trial. You can queue up a Prismatic Trial - basically a time trial in a controlled environment - from the main menu. You don't have to top the leaderboards or anything, just finish one successfully.
Risk of Rain 2 | How to unlock Harvester's Scythe. The Harvester's Scythe in Risk of Rain 2 grants +5% critical hit chance and heals you for 8 (+4 per stack) health with each critical hit. To unlock it, you need to complete the Prismatically Aligned challenge by completing a Prismatic Trial.
9 Harvester's Scythe
The Harvester's Scythe is a great item to stack, as it combines healing with critical hits. It will give you a five percent critical hit chance, and whenever a critical hit procs you will heal eight health. With each stack of a Harvester's Scythe, you gain an extra four health.
The Harvester's Scythe is a returning item in Risk of Rain 2. When landing a critical strike, the holder heals a flat 8 (+4 per stack) health, multiplied by the proc coefficient of the attack. Additionally, the first Scythe a player obtains grants +5% critical strike chance.
The best item in Risk of Rain 2 is without a doubt the 57 Leaf Clover. This item is in a league of its own when it comes to boosting your damage output and overall survivability.
For a boss item, Shatterspleen is a devastating item that virtually every Survivor can use. This item gives your critical strikes a way to apply a massive AoE explosion by bleeding enemies, dealing an absurd amount of damage. This is easily one of the strongest boss items in Risk of Rain 2.
After the recent patch, Captain and Loader are without a doubt the best survivors in Risk of Rain 2. They are very independent of their gameplay and aren't affected by any sort of enemy. Both Captain and Loader are capable of winning games on their own.
The engineer is the best solo character in Risk of Rain 2 without a doubt. Because his turrets get all of his items, it is like having two extra yous sitting around.
The Crowbar is a returning item in Risk of Rain 2. When the holder attacks an enemy that has more than 90% of its health remaining, they deal 75% more damage (+75% per stack).
All items can be stacked infinitely (at least up to the signed 32-bit integer cap of 2,147,483,647), and their effects will also stack accordingly.
Does shattered spleen stack?
And the rest of Shatterspleen seems to have insanely strong stacking: "Bleeding enemies explode on death for 400% (+400% per stack) damage, plus an additional 15% (+15% per stack) of their maximum health."
Stacks up to 18m (+12m per stack). The Frost Relic is a returning item in Risk of Rain 2. all enemies hit. The radius of the storm starts at 8m and increases by 2m per kill, up to a maximum of 18m (+12m per stack).

Not to be confused with the first game's version, Alien Head. The Alien Head is a returning Legendary item in Risk of Rain 2. It functions in a similar way as its previous incarnation, with the only difference being the way it stacks.
How to Obtain the 57 Leaf Clover. The Risk of Rain 2 57 Leaf Clover is one of the game's more powerful, legendary (red) items. In order to obtain it, you'll have to complete 20 stages in one single run. After doing so, the Risk of Rain 2 57 Leaf Clover will be eligible to drop while playing, just like other items do.
The 57 Leaf Clover adds one try per stack whenever an item tries to proc, increasing the chances to get a favorable outcome. This effect makes any items that have a chance to trigger more effective. These include critical hits, so scoring one becomes easier. Completing The Long Road Challenge unlocks this item.
Each stack beyond the first increases the range of the blast by 1.5 meters. All abilities get the bonus, as do most item effects, such as Ukuleles and Unstable Tesla Coil's lightning, Ceremonial Daggers' daggers, and N'kuhanas Opinions' skulls.
So far, as per Risk of Rain 2 Tier list, Rex is ranked in A-Tier, which is very good.
How to Unlock. REX is unlocked by completing the challenge "Power Plant". (Repair the broken robot with an Escape Pod's Fuel Array.) The challenge requires the player to acquire the Fuel Array item at the back of the escape pod at the beginning of the game, and escort the equipment all the way to Abyssal Depths.
The Prismatic Trials is a special, solo-only game mode where players compete for the fastest time of completing 2 stages. However, to initiate the Teleporter Event, the player must destroy three of a handful of Time Crystals scattered across the map.
How to complete Glorious Battle in Risk of Rain 2. The Glorious Battle challenge in Risk of Rain 2 requires you to charge the teleporter with less than 10% health remaining. However, you only need to reach the final 1% of the teleporter charge with low health to complete the challenge.
How do I access prismatic trial?
The Prismatic Trial is a special gamemode found on the main menu of the game and allows you to compete with other players online for the fastest time, featuring an identical game world for all players. Seeds for the game world change after a set of hours. A Prismatic Trial can only be entered while playing solo.
Predatory Instincts: critical hits increase attack speed. To unlock: reach 200% attack speed. The easiest way to buff your attack speed is by stacking Soldier's Syringes using a 3D printer.