Mages' Contest [Invasion] Dwarf Set: Beta Edition Type: Instant

Set: Beta Edition Type: Instant Rarity: Rare Cost: {U} Change the text of target spell or permanent by replacing all instances of one basic land type with another

Set: Magic 2014 Type: Artifact Rarity: Rare Cost: {2} {2}

Each untapped creature you control gets +0/+2 as long as it's not attacking

For goblins

Mages' Contest [Invasion] Dwarf Set: Beta Edition Type: InstantSet: Invasion Type: Instant Rarity: Rare Cost: {1}{R}{R} You and target spell's controller bid life. You start the bidding with a bid of 1. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid. If you win the bidding, counter that spell.