Sundial of the Infinite [Mystery Booster] Ultimate Masters Box Topper finding the Rainbow Vale was

finding the Rainbow Vale was often the goal of Knights' quests

Set: Power of the Duelist Card type: Field Spell Rarity: Ultimate Rare Attack: 0 Defense: 0 When a "Destiny Hero" monster attacks

you can discard up to 2 cards to the Graveyard to select the same number of cards your opponent controls

draw 1 card for each card Tributed

Sundial of the Infinite [Mystery Booster] Ultimate Masters Box Topper finding the Rainbow Vale wasSet: Mystery Booster Type: Artifact Rarity: Rare Cost: {2} {1}, {T}: End the turn. Activate only during your turn. (Exile all spells and abilities from the stack. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)