Soulbound...

[Monrodesign]

I'm sorry no one uses you.  Why is this?

[Dudecore]

Don't tell {Wolfir Silverheart}, {Druid's Familiar} and {Silverblade Paladin} that.

[Monrodesign]

Still so many other good ones. Really surprised no one has a deck built around its mechanic yet.

[Rass]

Lol I've seen a few.

[Silent1236]

My friend actually had a really annoying soulbond deck.

[Willthomjr]

The reason why it's not widely used is because it doesn't effect the board right away. Soul bound goes on the stack after creatures hit so you can still hit them with removal.