You just need a minimum of one creature on your board that will become your Ring-bearer and due to how The Ring mechanics work, said creature will meet the legendary condition for your tutor to be valid
In addition to the symbol, Enchanted cards are also recognizable by their unique borderless artwork and shimmering holofoil, as well as having their card numbers go beyond 204
It shuts down other effects as well - your opponents can't cast spells from anywhere other than their hands, so no casting spells using Madness, Plot, Mayhem, or a whole bunch of red impulse draw effects
The ability to bounce any permanent allows decks to cover their bases, gives you the option to position things early or in a waiting game by bouncing a land and it makes sure that you'll get to trigger the discard effect
1x Deckbuilding Strategy Guide: A brief insert providing advice on mana curves, colour fixing, and archetypes within the M20 sealed environment