Its extremely useful to untap all resources youve used on your turn, especially if you plan on casting cards with flash or using counterspells
The original bard with an odd Wizard type gives the creature it taps a permanent upkeep that lasts even after the Musician dies, so it's pretty good at slowing things down until it dies
Some packs replace a card with a wild card of the same rarity, but with every pack you open you earn credit towards additional ones
All things considered, it's a very low mana investment for how well it synergizes and interacts with the decks that want to include it
Mind Stone is the weakest of these, it's hardly good enough in monocolor decks these days and just plain awful in a 3C deck that needs mana-fixing
The Mirran Sword Cycle Sword of Body and Mind Sword of Feast and Famine Sword of Fire and Ice Sword of Forge and Frontier Sword of Hearth and Home Sword of Light and Shadow Sword of Once and Future Sword of Sinew and Steel Sword of Truth and Justice Sword of War and Peace Sword of Wealth and Power There are lots of swords in Magic, but when talking about the sword cycle Im referring to any card named Sword of X and Y (not counting the Un -set addition, Sword of Dungeons & Dragons)
