At four mana, he can sit at the top of your mana curve, and if you manage to drop a haste enabler such as Goblin Warchief, you can start doubling your goblins straight away (which then also have haste to attack the turn they enter)
The player who has the most options has the best chance of winning and this card has been much loved for consistently expanding those options as you battle your way to the top
To hope to win (because nothing is impossible), you must try to quickly outnumber your opponent, with combos like Ohm/Holy, for example, or with some of your trigger effects, or quickly manage cards that can eliminate your characters
Key Features: 1
You choose modes and, if you chose the third mode, a target for that ability as it goes on the stack
If Wolverine isn't blocked, Mage Slayer and Wolverine combined will essentially deal damage equal to four times whatever Wolverine's power is