Timestream Navigator [Rivals of Ixalan Prerelease Promos] Legendary Enchantment if this came under your

if this came under your control since the beginning of your last upkeep

Set: Alpha Edition Type: Creature — Hydra Rarity: Rare Cost: {X}{R}{R} Rock Hydra enters the battlefield with X +1/+1 counters on it

You don't ask why a plague spreads or a field burns

Set: Coldsnap Promos Type: Token Legendary Creature — Avatar Rarity: Rare Flying

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Rarity: Rare Cost: {5}{B} Sima Yi

Timestream Navigator [Rivals of Ixalan Prerelease Promos] Legendary Enchantment if this came under yourSet: 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.