Loki.

Items in their inventory when the game ended, across 18 games.

Item	Games	Of all games	Win rate
Aghanim's Scepter	10	55.6%	40.0%
Blink Dagger	9	50.0%	44.4%
Magic Wand	8	44.4%	75.0%
Boots of Travel	7	38.9%	57.1%
Black King Bar	6	33.3%	33.3%
Heart of Tarrasque	5	27.8%	60.0%
Power Treads	5	27.8%	40.0%
Phase Boots	4	22.2%	50.0%
Radiance	4	22.2%	50.0%
Abyssal Blade	4	22.2%	50.0%
Battle Fury	3	16.7%	66.7%
Manta Style	3	16.7%	33.3%
Spirit Vessel	2	11.1%	50.0%
Lotus Orb	2	11.1%	50.0%
Guardian Greaves	2	11.1%	50.0%
Blade Mail	2	11.1%	50.0%
Disperser	2	11.1%	50.0%
Shadow Blade	2	11.1%	50.0%
Butterfly	2	11.1%	50.0%
Desolator	1	5.6%	100.0%
Satanic	1	5.6%	100.0%
Eye of Skadi	1	5.6%	100.0%
Octarine Core	1	5.6%	100.0%
Vanguard	1	5.6%	100.0%
Boots of Speed	1	5.6%	0.0%
Aether Lens	1	5.6%	0.0%
Ghost Scepter	1	5.6%	0.0%
Platemail	1	5.6%	0.0%
Splintmail	1	5.6%	0.0%
Crimson Guard	1	5.6%	0.0%
Pipe of Insight	1	5.6%	0.0%
Holy Locket	1	5.6%	0.0%
Maelstrom	1	5.6%	0.0%
Skull Basher	1	5.6%	0.0%
Assault Cuirass	1	5.6%	0.0%
Yasha	1	5.6%	0.0%
Solar Crest	1	5.6%	0.0%
Hand of Midas	1	5.6%	0.0%
Ogre Axe	1	5.6%	0.0%