Lion can play both the role of a Carry or Support type hero. His roaming strategies and skills can ambush and kill heroes in an instant. His supportive skills are powerful enough to kill a hero though these skills require a lot of mana. But with the proper item build up, he can be a dangerous one.
The early game item build for Lion can be the following:
Ironwood Branch – This item grants each attributes for Lion giving him more strength and toughness to survive the early game plus the intelligence for mana support.
Ancient Tango of Essifation – This item helps Kaldr to regenerate when in mid health condition.
Healing Salve – This item helps Kaldr to regenerate more fast whenever he is in a low health condition.
Magic Stick – This helps you to counter spell caster enemy heroes.
Observer Wards – This is a strategic item to spy on your enemies. Supporting heroes just like Lion should do the warding strategy. This should maintain through the whole game.
Clarity Potion – This item helps Lion to regenerate his mana whenever it is in low condition.
Smoke of Deceit – This supportive item helps Lion and his allies to set a clash or gank against his opponents during the early game. This should be maintain through the whole game.
Sentry Wards – This strategic item helps Lion to deward a spying observer ward nearby.
Boots of Speed – This grants Lion movespeed for chasing and escaping.
The mid game item build for Lion can be the following:
Headdress of Rejuvenation – This may help Lion for better health regeneration.
Medallion of Courage – This can do the killing faster because of armor degrading.
Urn of Shadows – This can help Lion to serve himself and his allies in health regeneration. And also can do damage to enemies.
Magic Wand – This helps you to regenerate your mana and health in an instant depending on its charge.
Arcane Boots – This grants Lion and his nearby allies mana whenever its cooldown.
Ancient Janggo of Endurance – This grants Lion and his allies attack speed and movespeed.
Kelen’s Dagger – This can help him to gank, escape and chase enemies.
The late game item build for Lion can be the following:
Mekansm – This provides Lion and his nearby allies armor and hitpoints.
Khadgar’s Pipe of Insight – This helps allies of Lion and himself to prevent magic for damaging more.
Force Staff – This helps Lion in chasing and escaping.
Eul’s Scepter of Divinity – This grants Kaldr the ability to cyclone enemies and himself for chasing, setting and escaping.
Dagon – This grants Lion an ability to instant kill an enemy.
Aghanim’s Scepter – This improves his ultimate skill reducing its cooldown and improving damage.