Combined with a card such as "Merlin's Carpetbag" which can allow you to return an item from your discard, this can be a repeated process
When an opponent draws except for their normal draw step, you get a 1/1 green Snake creature token
First of all, white has plenty of good exile-based removal right now, such as Rides End
That's where Liesa, Shroud of Dusk comes in
Aarakocra Sneak Acquisitions Expert Aether Theorist Aetherblade Agent Aetherborn Marauder Aethertorch Renegade Agate Instigator Agent of Horizons Agent of Kotis Agent of Treachery Akki Underminer Akul the Unrepentant Aladdin Ali Baba Alley Assailant Alley Strangler Alora, Merry Thief Ambush Party Amphin Cutthroat Annie Flash, the Veteran Anowon, the Ruin Thief Ant-Man, Colony Commander Ant-Man, Elusive Avenger Ant-Man, Reformed Rogue Arala, Hedron Scaler Arms Dealer Astarion, the Decadent Atlantean Skirmisher Audacious Infiltrator Audacious Thief Auntie's Snitch Aven Interrupter Azula, Cunning Usurper Azure Beastbinder Backstreet Bruiser Bala Ged Thief Balustrade Spy Bane Alley Blackguard Bane Alley Broker Baneblade Scoundrel Battlefield Scavenger Beetle, Legacy Criminal Bilbo, Birthday Celebrant Bilbo, Retired Burglar Bill Ferny, Bree Swindler Bitterbloom Bearer Black Cat, Cunning Thief Black Market Tycoon Blackbloom Rogue Blade Juggler Blighted Agent Blightwing Bandit Blood Burglar Blood Hustler Bloodborn Scoundrels Bloodthirsty Aerialist Body Launderer Boggart Arsonists Boggart Forager Boggart Loggers Boiling Rock Rioter Bold Plagiarist Brazen Borrower Brazen Collector Bria, Riptide Rogue Brinebarrow Intruder Burning-Tree Vandal Butch DeLoria, Tunnel Snake Byway Barterer Cache Raiders Cackling Culprit Cackling Prowler
It also has protection from white, which is very relevant considering that white has a lot of good creatures and spot removal
