[Buff] Slime Traveller

Safety cards aren't about mana efficiency; if they were, Reclamation would be a terrible removal spell, even at its pre-nerf cost. Instead, the primary price tag on cards that bail you out from a disaster is deck space. When there's an effect in play that will win the game for the opponent, spending 8 mana or more to stop it is worth it. But what really matters is that, when the possibility the card is protecting you from isn't around, the card will still do something for you.

Compare to the current form of Burn! Burn!, which costs one heck of a lot less to accomplish the same task, but is (usually) a weak deck inclusion since it doesn't do anything if its intended target is not present. Back when it did consistently have something to do, it was stupidly overpowered.

For this card to be okay as a (generally) uninterruptible jack of all trades, it would need to cost much, much more than it presently does. And I mean more than doubling its current price tags.