mtg krenko commander deck EDH | Goblin Tribal Deck none) element.class Krenko, Mob Boss Goblin Tribal

He does offer the additional upside of an ultimate that can devastate your opponents' boards and beef up your own presence, which probably explains why the planeswalker is the more played commander

This allowed players to draft Rush of Knowledge quite highly, and splash it into many decks that otherwise wouldn't have had blue

Yeah, when you have a jackrabbit start against a creatureless deck and you can use this to get your guys back, its pretty good, but against a good chunk of the format, it either does nothing (no enters the battlefield ability) or helps your opponent out as well by giving them back a ton of good utility creatures

Here we have a spell called Even the Score, which is an instant spell that costs X and three Blue mana to draw X cards