Mindset
Accursed is primarily a support hero that can also tank when needed, your job will be to help out your team mates with shield's and heal's to keep them farming. You'll want to try and find a good agility carry to lane with and assist him as much as possible. A lot of people like to build accursed as a damage dealer with item's like Runed Axe but he requires a lot of items to output decent damage so it's much better to leave the farming to a proper carry.
Abilities
Cauterize
* Deals damage or heals allies at the cost of his own health.
* 100/150/200/250 damage/heal and 50/75/100/125 health cost
* Always costs 75 mana
* Now has a large range of 750 (up from 600)
* Short cooldown (6 seconds) means you can cast it multiple times during a fight.
Fire Shield
* Removes certain debuffs on cast
* Absorbs damage
* Deals aoe damage when max damage has been absorbed
* 100/140/170/200 damage/absorb 100/105/110/115 mana cost
Sear
* Slows targets movement speed
* People attacking the target gain 10/20/30/40 % increased attack speed and 10% movement speed
* Not an orb
Flame Consumption
* Heals based on damage done during duration of ability (1:1 ratio)
* Will auto activate if below 400 hp
Strategy
Accursed's abilities all have very good synergy with eachother, and it is essential to learn how to combo his spells to be effective. Accursed can be deadly early game by fire shielding himself and casting cauterize on an enemy, as the damage returned from cauterize is absorbed by the shield causing it to explode and deal even more damage. Casting Cauterize whilst flame consumption is active is also a free heal as the damage is absorbed and turned into health.
Remember that fire shield can remove harmful debuff such as many stuns and slow's from it's target when applied so you can save teammates from sticky situations with a well timed shield to negate a stun.
Items
Enhanced Marchers are good as they allow you to chase and catch up to people to apply Sear which can slow them and then allow the rest of your team to catch them. Plated greaves are also very good and fit accursed's support/tank role perfectly if noone else on your team buys them adding damage block and armor for the team.
Ring of Sorcery should be your first aim, and now that you can buy a pickled brain at the outposts (side shops) you can easily rush that for a hefty early game mana pool. This provides you with all the regen that you need to spam shield and cauterize and benefits the team aswell in pushes.
Astrolabe is a great AOE team heal that helps to support your team when cauterize and shields alone cannot handle the amount of damage that is being put out in big team fights.
Skill Build
Fire Shield
Cauterize
Cauterize (keep cauterize ahead of shield because its low mana and will set off shield instantly till later levels because the self damage > shield absorb)
Fire Shield
Cauterize
Flame Consumption
Cauterize
Fire Shield
Fire Shield
Sear
Flame Consumption
Then you can either take stats for more HP and tankability or Sear for more damage if you feel that you don't need the extra HP and mana from stats.