As great as the synergy with the two cards you listed is, I question whether it's truly a "must" have or is a "nice" to have.  To wit, it is a 6 casting cost sorcery that is more or less dead on its own.  If you want to combine it with Spin, its 11 mana total; 9 with Hinder.  Both of those cards are good on their own.  I question whether the same can be said for Tunnel.  In fact, in order for it to really be a game breaker, I think you'd have to build your deck around it.