Shuffling must be done so that the faces of the cards cannot be seen. Regardless of the method used to shuffle, players’ decks must be sufficiently randomized. Each time players shuffle their deck, they must present their deck to their opponent for additional shuffling and/or cutting. Players may request to have a judge shuffle their cards rather than pass that duty to their opponent, this request will be honored at a judge’s discretion. By presenting their decks to their opponents, players are stating that their decks are correct, legal, and sufficiently randomized.
Echo and Vanishing are triggered abilities and just like most spells and abilities you can respond to them. If your Pouncing Jaguar is in play and the echo triggered ability goes on the stack you can respond by Boomeranging it back to your hand.
Breeding Pit. Ill pay for the First round of Skullclamps