While it can grant you two extra combat steps for five mana, its by no means the default choice for this effect
I generally don't like high risk cards for my filler and support roles but there are a lot of potential rewards the little Explorer offers
When a creature with a bounty counter on it dies, each player except its controller draw a card and gains two life
This move can also break barriers, such as Light Screen and Reflect
As such, Wizards of the Coast printed an upgraded version in 2011s New Phyrexia set, Phyrexian Obliterator, which forces the player that dealt damage to it to sacrifice permanents instead
You know, since its Shota, and he basically forces U/B in all Constructed formats, all of the time