After sorting out her +1/+1 counters, you can delcare her as an attacker and attack your opponent
He also gives any lessons in the graveyard a flashback cost of one mana, and with Catalyst Stone on the field, that means they're free

Death and Taxes Thalia, Guardian of Thraben | Illustration by Jana Schirmer & Johannes Voss (100) Adeline, Resplendent Cathar Aether Vial Ancient Tomb Anointed Peacekeeper Archon of Emeria Armageddon Aven Mindcensor Brave the Elements Castle Ardenvale Cathar Commando Cave of the Frost Dragon Cavern of Souls Champion of the Parish Charming Prince Chrome Mox City of Traitors Containment Priest Dauntless Bodyguard Dryad Militant Eiganjo Castle Eiganjo, Seat of the Empire Elite Spellbinder Emeria's Call Ephemerate Esper Sentinel Ethersworn Canonist Extraction Specialist Fateful Absence Field of Ruin Fight as One Flagstones of Trokair Ghost Quarter Giver of Runes Harm's Way Hopeful Initiate Horizon Canopy Intrepid Adversary Kaldra Compleat Karakas Kytheon, Hero of Akros Legion's Landing Leonin Arbiter Lion Sash Luminarch Aspirant Mana Crypt March of Otherworldly Light Mardu Woe-Reaper Mental Misstep Mother of Runes Mox Pearl Palace Jailer Path to Exile Phyrexian Censor Phyrexian Revoker Plains x16 Ranger-Captain of Eos Ravages of War Recruiter of the Guard Recruitment Officer Resolute Reinforcements Rishadan Port Seasoned Dungeoneer Selfless Spirit Shadowspear Siege Veteran Silent Clearing Skullclamp Skyclave Apparition Soldier of the Pantheon Solitude Spirit of the Labyrinth Steelshaper's Gift Stoneforge Mystic Sunbaked Canyon Sungold Sentinel Swords to Plowshares Thalia, Guardian of Thraben Thalia, Heretic Cathar Thalia's Lieutenant Umezawa's Jitte Urza's Saga Usher of the Fallen Walking Ballista Wasteland White Plume Adventurer Death and Taxes is a mono white deck that has one goal: beat down your opponent with little white creatures, while using tax effects to pressure their resources

If you dont like the prices or selection at one store, the next may be as far as one city block or as close as another floor in the same building
Don't underestimate lore-drain cards like Rapunzel, Letting Down Her Hair, Aladdin, Street Rat , and especially Aladdin, Heroic Outlaw