Early
You are a melee core which makes it already a good pickup, but it also works great with Track movement speed bonus and your items. You will be able to engage and disengage at speeds so high so most heroes won't be able to catch up to you
Situational Early
Good early tankiness solution. Can be upgraded into Crimson Guard (utility way) which is pretty good item for your team overall
Lategame
Another snowballing item and another flat movement speed bonus. It makes you strong at both defense and offense
Another reliable disable for your team. You will lose some damage with it, but considering BH's damage output it won't be a problem anyway
Situational
Nice agressive addition to amplify your damage output
Good pickup to increase tankiness, it also stacks with SnY making you hard to lock with disables
Utility
Great item for both offense and defense. Stats and flat movement speed make it great in terms of damage, mobility and tankiness, and it's active component drastically increases your damage output
You can also use it on friendly catapult or another core on your team to push faster
Good tankiness and utility item overall, good solution against physical damage
Good tankiness solution, works well against high damage enemy cores