Like Iago, if your opponent has no available way to choose this card, then theyll need to tackle it head on, which isnt always optimal
While the "legend rule" doesn't apply to Slivers you control, you can control any number of legendary Slivers with the same name and none of them will be put into the graveyard

Nekusar, the Mindrazer Nekusar, the Mindrazer | Illustration by Mark Riddick Commander (1) Planeswalker (4) Ashiok, Dream Render Jace Beleren Ob Nixilis Reignited Ob Nixilis, the Hate-Twisted Creature (19) Bone Miser Scrawling Crawler Razorkin Needlehead Elder Brain Fate Unraveler Fell Specter Goblin Electromancer Kami of the Crescent Moon Kess, Dissident Mage Magus of the Jar Nightscape Familiar Niv-Mizzet, Parun Niv-Mizzet, the Firemind Obosh, the Preypiercer Sheoldred, the Apocalypse Stormfist Crusader Tergrid, God of Fright The Locust God Vito, Thorn of the Dusk Rose Instant (11) Aetherize Bedevil Brainstorm Counterspell Crosis's Charm Dark Ritual Negate Perplex Rakdos Charm Terminate Vision Skeins Sorcery (11) Collective Defiance Cruel Ultimatum Dark Deal Deadly Tempest Diminishing Returns Game Plan Khorvath's Fury Peer into the Abyss Prosperity Wheel of Misfortune Whispering Madness Enchantment (8) Curse of Obsession Megrim Phyrexian Tyranny Raiders' Wake Spiteful Visions Underworld Dreams Well of Ideas Wizard Class Artifact (9) Arcane Signet Decanter of Endless Water Folio of Fancies Geth's Grimoire Mind Stone Relic of Sauron Otherworld Atlas Sol Ring Teferi's Puzzle Box Land (37) Seething Landscape Bojuka Bog Command Tower Crumbling Necropolis Thundering Falls Geier Reach Sanitarium Island x7 Maestros Theater Mountain x6 Myriad Landscape Smoldering Marsh Sunken Hollow Swamp x12 Xander's Lounge Undercity Sewers One of my first 3-color decks ever was Nekusar, the Mindrazer

His first ability lets you discard up to two cards and draw that many, and the second lets you sacrifice an Artifact to return one from the graveyard to the battlefield
Jund Wildfire: [card]Cleansing Wildfire[/card] is the name of the game here, disrupting your opponents mana base while you build your own