Amazing card! But just using this to counter Druids ramp is not gonna work that great I think.
This has a lot of potential in control decks that struggle against Combo decks. Just drop this when you think your opponent wants to Togwaggle/Shudder/Malygoose/Mecha'thun you and you get 4 extra turns to kill him before he comboes you.
1. Anti Druid 2. Potentially "anti combo", giving you up to 4-5 additional turns to finish a Combo Deck which requires 10 mana to go off 3. Potentially a potent Aggro card, as it remove potential "big turn" from Control decks
Can be bounced back to lock (mana intensive) combo decks forever away from victory.