Timestream Navigator [Rivals of Ixalan Prerelease Promos] 031 destroy all creatures blocking or

destroy all creatures blocking or blocked by it

and Y is half the number of Forests you control

Set: Black & White: Legendary Treasures Type: Fire Rarity: Ultra Rare Retreat cost: Colorless

{T}: Gain control of target legendary creature for as long as you control Willow Satyr and Willow Satyr remains tapped

Set: Team Rocket Unlimited Type: Fire Rarity: Promo Retreat cost: Colorless

Timestream Navigator [Rivals of Ixalan Prerelease Promos] 031 destroy all creatures blocking orSet: Rivals of Ixalan Prerelease Promos Type: Creature Human Pirate Wizard Rarity: Mythic Cost: {1}{U} Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) {2}{U}{U}, {T}, Put Timestream Navigator on the bottom of its owner's library: Take an extra turn after this one. Activate only if you have the city's blessing.