22.

Items in their inventory when the game ended, across 17 games.

Item	Games	Of all games	Win rate
Blink Dagger	9	52.9%	55.6%
Magic Wand	6	35.3%	83.3%
Phase Boots	6	35.3%	83.3%
Smoke of Deceit	4	23.5%	75.0%
Black King Bar	4	23.5%	50.0%
Aghanim's Scepter	4	23.5%	25.0%
Force Staff	3	17.6%	66.7%
Eul's Scepter of Divinity	3	17.6%	33.3%
Tranquil Boots	3	17.6%	33.3%
Sentry Ward	3	17.6%	33.3%
Arcane Boots	3	17.6%	33.3%
Power Treads	3	17.6%	0.0%
Crimson Guard	2	11.8%	100.0%
Blade Mail	2	11.8%	100.0%
Lotus Orb	2	11.8%	50.0%
Bracer	2	11.8%	50.0%
Observer and Sentry Wards	2	11.8%	50.0%
Battle Fury	2	11.8%	50.0%
Manta Style	2	11.8%	50.0%
Glimmer Cape	2	11.8%	0.0%
Wraith Band	2	11.8%	0.0%
Energy Booster	1	5.9%	100.0%
Dust of Appearance	1	5.9%	100.0%
Harpoon	1	5.9%	100.0%
Pipe of Insight	1	5.9%	100.0%
Void Stone	1	5.9%	100.0%
Solar Crest	1	5.9%	100.0%
Null Talisman	1	5.9%	100.0%
Mekansm	1	5.9%	100.0%
Gem of True Sight	1	5.9%	100.0%
Ring of Tarrasque	1	5.9%	100.0%
Guardian Greaves	1	5.9%	100.0%
Skull Basher	1	5.9%	100.0%
Butterfly	1	5.9%	100.0%
Boots of Travel	1	5.9%	100.0%
Ultimate Orb	1	5.9%	100.0%
Refresher Orb	1	5.9%	100.0%
Soul Ring	1	5.9%	100.0%
Scythe of Vyse	1	5.9%	0.0%
Ghost Scepter	1	5.9%	0.0%
Gris-Gris	1	5.9%	0.0%
Point Booster	1	5.9%	0.0%
Heart of Tarrasque	1	5.9%	0.0%
Assault Cuirass	1	5.9%	0.0%
Shiva's Guard	1	5.9%	0.0%
Bottle	1	5.9%	0.0%
Clarity	1	5.9%	0.0%
Iron Branch	1	5.9%	0.0%
Claymore	1	5.9%	0.0%
Roshan's Banner	1	5.9%	0.0%
Hurricane Pike	1	5.9%	0.0%
Falcon Blade	1	5.9%	0.0%