Granted you can attempt to play around the card freezing you out of your lands for a turn after you use them but it's easier said than done and most of the time your ability to play the game is extremely diminished
However, its ability to shut down the Saheeli combo by making all of the Felidar Guardians enter tapped gives her new purpose
Built on Rubys firepower and Steels resilience, it emphasizes control, tempo, and board dominance
Pink Horrors are a staple for spell decks now
Triggered abilities (starting with "when," "whenever," or "at") are unaffected by the cost reduction ability of Agatha of the Vile Cauldron
He does a great job of getting in two points of poison in the midgame, and if you managed to snatch either a Grafted Exoskeleton or a Tainted Strike, he can finish the job