This Ancient Apparition, Kaldr guide will in two part, item build and skill build.
Item Build
Kaldr is an intelligence hero with range attack and 295 movement speed at start of the game. On the staring of the game, avoid facing to 2 hero, because each hero 1 skill on you, you sure will be the First Blood!
First buy an empty bottle to restore your mana point to use 1st skill (Cool Feet) on hero. second item will be the Shout Shied + Ring of Health + Vitality Booster to get the Vanguard. With vanguard you can fight face to face with opponent hero, with your 1st skill and the 3rd skill (Chilling Touch). Beside buy a Power Treads and a Void Stone to add on your mana regeneration.
At most of the time Kaldr will be a supportive hero, you can choose either buy a Eye of Skadi first or
Guinsoo Scythe of Vyse first to support your teammate on fighting.
Check out the Kaldr item list
Skill Build
Mainly up the Kaldr 1st skill (Cool Feet) to 4th level follow by its 3rd skill (Chilling Touch). Keep spamming the Cool Feet on hero to lower their hit point while on leveling. If you with a stunner hero, you can try to make a combo kill at around level 3~4.
Combo Skill
To make a combo skill, active the Kaldr 3rd skill (Chilling Touch) on your stunner teammate and yourself (Chilling Touch will add +40, +50 magic damage), then ask your stunner teammate stun the opponent hero follow by your 1st skill (Cool Feet) on the opponent hero. The opponent hero will in stunning status and follow by freezing (around 4~8 second for you to kill the hero).
Learn your ulti skill (Ice Blast) on LV6. If you notice an opponent hero hit point (HP) below 20%, use your ulti skill on the hero. If you can target the hero, the hero sure will get kill by the Kaldr ulti.
You can get Kaldr hero replay at
Dota Replay - Kaldr Hero Replay
Mainly up the Kaldr 1st skill (Cool Feet) to 4th level follow by its 3rd skill (Chilling Touch). Keep spamming the Cool Feet on hero to lower their hit point while on leveling. If you with a stunner hero, you can try to make a combo kill at around level 3~4.
To make a combo skill, active the Kaldr 3rd skill (Chilling Touch) on your stunner teammate and yourself (Chilling Touch will add +40, +50 magic damage), then ask your stunner teammate stun the opponent hero follow by your 1st skill (Cool Feet) on the opponent hero. The opponent hero will in stunning status and follow by freezing (around 4~8 second for you to kill the hero).
Learn your ulti skill (Ice Blast) on LV6. If you notice an opponent hero hit point (HP) below 20%, use your ulti skill on the hero. If you can target the hero, the hero sure will get kill by the Kaldr ulti.
The Murloc NightCrawler, Slark hero guide will in 2 section, item build and skill build. 
Dark Pact skill is the Slark main skill. Learn this dark pact skill until LV3 on LV5.
