Chromatic Star [Double Masters] X-Saber Power-Up you can substitute this card

you can substitute this card for any 1 "Nordic" Tuner

but it is fickle

Set: Duel Terminal 1 Card type: Normal Monster Rarity: Super Rare Attack: 3000 Defense: 2500

Set: Modern Horizons Type: Creature — Sliver Rarity: Uncommon Cost: {1}{R}{W} Sliver creatures you control have "When this creature enters the battlefield

Modular 6 (This creature enters the battlefield with six +1/+1 counters on it

Chromatic Star [Double Masters] X-Saber Power-Up you can substitute this cardSet: Double Masters Type: Artifact Rarity: Common Cost: {1} {1}, {T}, Sacrifice Chromatic Star: Add one mana of any color. When Chromatic Star is put into a graveyard from the battlefield, draw a card.