I'm not sure whether or not that effect is worth a slot, but the effect is basically free, so it's worth trying
I really wouldn't recommend getting a complete set of Black Bolt and White Flare, but this dual set is a collectors dream with all the stunning artwork on display
Something else new to this set is Mutagen Tokens , which read as the following: "1 (Mana), Sacrifice this token: Put a +1/+1 counter on a target creature
The town's citizens refuse to trust or accept Cecil and the elder tasks him to traverse the deadly Mount Ordeals to become a paladin
Hard to say without solid playtesting though
As such, it can be difficult to keep on top of which cards are worth the most, especially as new packs and expansions continue getting released