It lets you cheat on the first equipment cost you pay per turn, which is great to keep your responses quick and flexible
If you do, that creature gains first strike until end of turn and must be blocked this turn if able
Roshan, Hidden Magister does the same, alongside granting some evasion, which goes well with Glitch Interpreter
If multiple sources deal damage to a creature with an enrage ability at the same time, most likely because multiple creatures blocked that creature, the enrage ability triggers only once
From powerful creatures to game-changing spells, the possibilities are nearly endless
However his three toughness puts him well in range of most removal, so he's not at risk of becoming a Sheoldred-style threat that you have to tech around