This is often a bigger advantage than Arcane Signet, since it applies to multiple spells per turn
This includes both yours and your opponents
So, now, lets take a look at the top 10 cards defining the Standard format right now
This is typically a blue ability, with cards like Sleep and Assassin Gauntlet, though white gets in on the fun with Blinding Light, Bond of Discipline, and a few others
Best vampires Creature (32) 1x Anowon, the Ruin Sage 1x Blood Artist 1x Bloodline Keeper Flip 1x Bloodline Necromancer 1x Bloodlord of Vaasgoth 1x Bloodtracker 1x Burnished Hart 1x Butcher of Malakir 1x Captivating Vampire 1x Champion of Dusk 1x Cordial Vampire 1x Dark Impostor 1x Drana, Liberator of Malakir 1x Elenda, the Dusk Rose 1x Forerunner of the Legion 1x Indulgent Aristocrat 1x Kalitas, Bloodchief of Ghet 1x Legion Lieutenant 1x Malakir Bloodwitch 1x Mavren Fein, Dusk Apostle 1x Necropolis Regent 1x NIghthawk Scavenger 1x Olivia Voldaren 1x Patron of the Vein 1x Rakish Heir 1x Sanctum Seeker 1x Sangromancer 1x Stromkirk Captain 1x Twilight Prophet 1x Vampire Nighthawk 1x Vampire Nocturnus 1x Yahenni, Undying Partisan Planeswalker (2) Land (36) 1x Akoum Refuge 1x Blood Crypt 1x Bloodfell Caves 1x Bojuka Bog 1x Boros Garrison 1x Clifftop Retreat 1x Command Tower 1x Dragonskull Summit 1x Godless Shrine 1x Isolated Chapel 1x Kabira Crossroads 3x Mountain 1x Myriad Landscape 1x Nomad Outpost 1x Orzhov Basilica 1x Path of Ancestry 4x Plains 1x Rakdos Carnarium 1x Scoured Barrens 6x Swamp 1x Temple of Malice 1x Temple of Silence 1x Temple of the False God 1x Unclaimed Territory 1x Vault of the Archangel 1x Wind-Scarred Crag Instant (6) Commander (1) Artifact (11) 1x Arcane Signet 1x Blade of the Bloodchief 1x Chromatic Lantern 1x Commander's Sphere 1x Door of Destinies 1x Herald's Horn 1x Icon of Ancestry 1x Idol of Oblivion 1x Skullclamp 1x Sol Ring Enchantment (7) 1x Anointed Procession 1x Black Market 1x Blind Obedience 1x Cathars' Crusade 1x Sanguine Bond 1x Smothering Tithe 1x Stensia Masquerade
