Master Of Arms

Fire out a lightning that splits on target enemy into 2 bolts upon reaching its target, which inflicts 90 / 160 / 230 / 300 Magic Damage and a 1.4 / 1.6 / 1.8 / 2 second Stun to the main target, and 100 Magic Damage and a 40% Tapering Slow over 1.5 seconds to targets hit by the split projectiles.

Lobs an Acid Bomb at the target location that rolls, spraying acid which lasts for 6 seconds that lowers Armor by 1 / 2 / 3 / 4, applies a 11 / 14 / 17 / 20% Movement Speed Slow, and deals 20 / 35 / 50 / 65 Physical Damage per second to enemies which stand in it.

Bulldozer
Bulldozer adds 0 / 105 / 120 / 135 / 150 Attack Range and 0 / 8 / 16 / 24 / 32 Attack Damage.

Cheetah
Cheetah reduces your Attack Damage by 10% against heroes and increases Attack Speed by 0 / 45 / 70 / 95 / 120.

Staff of the Master simultaneously grants the effects of both Bulldozer and Cheetah.

Target an ally hero or self to grant them a shield that absorbs 200 / 400 / 600 post-mitigation Damage. Lasts up to 8 seconds.

Independent of the shield, you gain 100 / 150 / 200 Attack Speed on Cheetah and an extra 40 / 50 / 60 Attack Damage on Bulldozer for 14 seconds. You also gain a tapering 60 / 90 / 120 Movement Speed bonus for the first 6 seconds.

Staff of the Master causes imperfections. The Attack Speed and Attack Damage bonuses from Master's Call drops to 70% effectiveness.