Vivid Creek [Commander 2011] 18a You can only activate 1

You can only activate 1 "Time Thief Retrograde" per turn

it gains 800 ATK and DEF until the end of your opponent's next turn

Set: Time Spiral Type: Creature — Sliver Rarity: Common Cost: {1}{R} All Sliver creatures have menace

Set: 2021 Tin of Ancient Battles Card type: Quick-Play Spell Rarity: Super Rare Target 1 Xyz Monster you control and 1 monster your opponent controls with ATK less than or equal to it

Vivid Creek [Commander 2011] 18a You can only activate 1Set: Commander 2011 Type: Land Rarity: Uncommon Vivid Creek enters the battlefield tapped with two charge counters on it. {T}: Add {U}. {T}, Remove a charge counter from Vivid Creek: Add one mana of any color.