Timestream Navigator [Rivals of Ixalan Prerelease Promos] Standard "The secret to invention is

"The secret to invention is to see something in your mind

Set: Champions of Kamigawa Type: Enchantment Rarity: Rare Cost: {2}{G} Whenever a player taps a land for mana

Whenever a creature with power 4 or greater enters the battlefield under your control

where X is 2 plus the sacrificed creature's mana value

You gain 4 life for each creature tapped this way

Timestream Navigator [Rivals of Ixalan Prerelease Promos] Standard "The secret to invention isSet: 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.