Krosan Constrictor Normally we see 2/2 Swampwalkers costed at three mana, so the real question with Krosan Constrictor is if access to its activated ability is really worth the extra one mana
Since almost all Eldrazi are colorless, except a very select few, you can search your deck for any big Eldrazi you desire
You can even pay a little extra to gain a small creature body on top of the exchange, or some other kind of permanent advantage
Throwing away a couple of tokens to strip your opponents of their hands puts you in a great spot in terms of card advantage, doubly so with discard payoffs like Tergrid, God of Fright and Waste Not
You also get codes allowing two people to unlock these decks in Magic: The Gathering Arena, so you can play online
The four-drop slot is loaded with some great creatures to choose from