bandai one piece booster box Piece: Legacy of the Master (OP-12) : Toys & Games 24 booster packs per display. One Piece Card Game Kingdoms

3: Target creature you don't control phases out

To the Dark World

This lets you wring out some extra value by essentially negating the downside of other cards that have you discard as an additional cost

You can argue that mana is the most important resource in Magic, so getting more of it is one of the best game actions you can take

These include cards such as Kozilek (card draw, counter), Deepfathom Skulker (card draw, unblockable), Sire of Stagnation (card draw), Oblivion Sower (land fetch), Desolation Twin (creature token), Drowner of Hope (creature tokens, tap), World Breaker (removal), Hideous Taskmaster (steal, annihilator), etc

Over the long term, the unpopularity of the set could make it easier for these cards to end up fairly expensive, especially the ones that end up catching on in Commander