Originally Posted by
Rock Lee
Well, DRS has always kept a place in Mono Green lists. All the Mono Green lists oscillate between 0-2 so the card does deserve merit. Amusingly, I was running DRS in the list I was testing as it nearly guarantees that you have creature type in the graveyard.
Regarding Emrakul, the Promised End, I don't feel a need to defend the card. I will jam this card harder than strawberry in my deck exclusively for its effect, which I have outwardly stated I wanted since mid 2010. I will caution though, that like most components of this deck, a poor understanding of the meta and other decks will make this deck and therefore this card progressively weaker. Knowing how to Mindslaver someone is an art and not everyone is up to the task.
Worldbreaker is there as a meat-shield. In Hearthstone he would have Taunt. I would say 40-50% of the time I play him I exile a land. 30-40% an artifact (null rod, chalice, shardless agent, Revoker, Vial, Equipment, Pithing needle, top that flips) and 10-20% an enchantment (vortex, eidalon, blood moon, sneak attack, sylvan library).
The kicker is against non-blue, he is an enormous pain to deal with. stopping the aggression of nearly every creature in the format. You can also be more aggressive with your mana ramp since you know you will be unmolested. Krosan Grip however, is a huge brick vs most non-blue decks with aggro components. (Eldrazi Aggro and Burn being the biggest culprits here).
Against blue decks, it still does minor damage, sometimes its only role and the same duty as Krosan Grip. But unlike Krosan Grip, after doing its duty, it either gets countered (loss of advantage for them) and then has recursion, or it sticks around versus decks not meant to beat a wall.
In my version of Caw's list, I run 4 Krosan Grip sb, and 2 World Breaker main, which seems to speak directly to your point of contention regarding Krosan Grip's validity. Grip is there for sideboard cards, but World Breaker hits every deck somehow even pre-sideboard. A rare opportunity where a card could merit a maindeck or sideboard spot.