Guts.

Items in their inventory when the game ended, across 9 games.

Item	Games	Of all games	Win rate
Black King Bar	5	55.6%	60.0%
Blink Dagger	4	44.4%	25.0%
Parasma	3	33.3%	100.0%
Aghanim's Scepter	3	33.3%	33.3%
Eul's Scepter of Divinity	2	22.2%	100.0%
Daedalus	2	22.2%	100.0%
Power Treads	2	22.2%	50.0%
Swift Blink	2	22.2%	50.0%
Monkey King Bar	2	22.2%	50.0%
Linken's Sphere	2	22.2%	0.0%
Magic Wand	2	22.2%	0.0%
Mjollnir	1	11.1%	100.0%
Shiva's Guard	1	11.1%	100.0%
Nullifier	1	11.1%	100.0%
Eye of Skadi	1	11.1%	100.0%
Mage Slayer	1	11.1%	100.0%
Scythe of Vyse	1	11.1%	100.0%
Overwhelming Blink	1	11.1%	100.0%
Revenant's Brooch	1	11.1%	100.0%
Hydra's Breath	1	11.1%	100.0%
Silver Edge	1	11.1%	0.0%
Wind Lace	1	11.1%	0.0%
Harpoon	1	11.1%	0.0%
Abyssal Blade	1	11.1%	0.0%
Disperser	1	11.1%	0.0%
Refresher Shard	1	11.1%	0.0%
Diffusal Blade	1	11.1%	0.0%
Skull Basher	1	11.1%	0.0%
Phase Boots	1	11.1%	0.0%
Yasha and Kaya	1	11.1%	0.0%
Ethereal Blade	1	11.1%	0.0%
Boots of Travel	1	11.1%	0.0%
Glimmer Cape	1	11.1%	0.0%
Observer Ward	1	11.1%	0.0%
Tranquil Boots	1	11.1%	0.0%