From basic abilities like flying (Winged Sliver) and first strike (Talon Sliver), to powerful effects such as destroying permanents (Necrotic Sliver) and Afflict 2 (Lazotep Sliver)
But since Hobgoblin Bandit Lord pumps up the whole board and has an activated ability that can win the game with one good turn, standard goblins is now a going concern
Undoubtedly this will become a common mechanic in the game moving forward, as healing damage from characters already is
There are definitely times when it'll be your all-star card, but I can also imagine cutting it from the deck that's not got many instants
You can easily make a game winning amount of mana for your deck from this simple tap from fueling an X spell like Jaya's Immolating Inferno or Exsanguinate to dropping stuff like Eldrazi Titans and Blightsteel Colossus and then equipping with Greaves and winning
Green doesnt hurt for mana production, meaning you could reasonably activate this effect earlier than turn six