Lion

Use Earth Spike strategically so that you can get extra right-clicks in, deny a creep or secure a last hit.

You can skill Hex on level 2 to score a kill.

Hex and Mana Drain destroy basic illusions instantly.

Make a move whenever you have Finger of Death available.

When Finger of Death is on cooldown, use the time to farm your Blink Dagger.

Initiate on enemies with your long lasting disables, so your allies can follow-up for a kill.

Fight around good vision, so you can land multi-hero Earth Spikes.

Aghanim's Shard is good at countering illusion-based heroes.

Keep an eye on the mana pool of allies around you and top them up with Mana Drain if they are low on mana.

Position yourself to get an uninterrupted Mana Drain as a follow up on Earth Spike to harass enemy heroes from a distance.

Use fog of war to cancel Lion's Mana Drain

Opt for anti-magic damage items against Lion

Be aware of Lion's level 6 Finger of Death. Infused Raindrop might help you to survive the burst

Lotus Orb is an effective item against Lion as all of his spells are targetable

Look to target Lion in team fights as he provides a lot of control and magic damage against your cores and is also a very squishy hero