Item Tip: Blink Dagger

One of the most useful escape/hero killing/gank potential items that does not have a counter item or hero in my opinion, besides itself, is the blink dagger. At 2150, it is very versatile for the reasons mentioned above, and for its extreme enhancement of certain heroes. In this post I will attempt to mention as many heroes as I can that benefit tremendously from a blink dagger. Off the top of my head, the only heroes that I think should never get a blink dagger are ones that just cannot (pudge, vengeful spirit), ones that already have the ability to blink (QoP, Anti Mage etc.) and heroes w/ extreme move speed abilities (Clinkz, Weaver, Dark Seer etc.) . Other than these three categories, most heroes benefit from a dagger.

Heroes that benefit the greatest from a dagger due to the enhancement of ultimates, or their spells in general are:

Magnataur - His ultimate is AoE stun, and draws people toward him so the element of surprise is key for this so one can make sure they enemy is grouped together to get the maximum number of heroes stunned

Sand King - His ultimate has a long casting time, making him very vulnerable and is easily countered by a stun. Dagger allows him to cast his ultimate in a safe area unknowing to the enemies and then right when it triggers he can blink in and get the epicenter effects, and also impale.

Crystal Maiden - Her ultimate is mass AoE damage and her move speed is very slow and she is intelligence with low health. So instead of attempting to run into a group of enemies to cast her ultimate, and most likely dying before you get there, blink dagger allows her to teleport in and get it off before anyone notices, keeping enemy heroes bunched together for maximum AoE damage

Earthshaker- Same thing as CM. Slow ms, and also damage is dealt on his ultimate based on closeness to earthshaker, and then is compounded by units around the area of the ultimate, so a blink dagger is perfect to surprise a hero around a number of creep, or a group of heroes, and then let out a fissure and enchant totem and get the full triple effect of his passive stun when you cast a spell as well.

Others include, but not limited to: slayer, luna, enigma, juggernaut, shadow fiend, sniper, ursa warrior, tiny, rhasta, witch doctor, axe, slardar, venomancer, tormented soul, death prophet

Anyone with an AoE ult is a decent hero for a blink dagger, as well as damage dealers with slows where element of surprise is key and prep time is needed (ursa warrior, tiny, rhasta). To conclude, dagger ensures the full effect of any AoE because of the ability to surprise a hero, and also the ability to relocate instantly within a 500 range of your present state maximizing your pathing and giving you great gank potential.