I found a problem when I watched dota jokes in hf. What's lina in dota? What is the d of this character? Can you open a tree?

Lina Inverse, abbreviated as Fire Lady, is a guardian intellectual hero in the customized map DotA adapted from warcraft 3: Frozen Throne, located in Shuguang Tavern.

D is a dragon slave.

Shortcut: [D] Dragon Break Chop

Release the flame, causing damage to enemy units in a straight line. The cooling time is 8.5 seconds. Level 1-Releases fire, causing 100 damage to enemy units in a straight line. Consumes 90 mana. Level 2-Releases fire, causing 170 damage to enemy units in a straight line. Cost 105 mana. Level 3-Releases fire, dealing 230 damage to enemy units in a straight line. Cost 125 mana. Level 4-Releases fire, dealing 280 damage to enemy units in a straight line. Cost 140 mana.

T that can't open the tree can be called lightning strike array.

Shortcut: [T] Summons a pillar of fire to cause damage to the target in the area, stunning 1.6 seconds. The casting distance is 600, and the cooling time is 10 second. Spell delay 0.5 seconds. Light strike array

Level 1-Summons a pillar of fire that deals 90 damage to nearby targets and stuns them for 1.6 seconds. Consumes 90 mana. Level 2-Summons a pillar of fire, causing 150 damage to targets in the area and stunning 1.6 seconds. Cost 100 mana. Level 3-Summons a pillar of fire to deal 2 10 damage to targets in the area and stun them for 1.6 seconds. Cost 1 10 mana. Level 4-Summons a pillar of fire to deal 280 damage to nearby targets and stun them for 1.6 seconds. Cost 125 mana.