After all, Walking Ballista goes infinite with pretty much anything
Falco Spara, Pactweaver Crime lord Falco Spara, Pactweaver is probably best known for its combo potential with Devoted Druid, and I find myself yet again asking my editors when were going to commission that Devoted Druid article I keep asking for
There are actually 179 different Pirate creatures in the game
1 Glacial Fortress
While the flexibility these abilities offer is already quite powerful, unlike other Planeswalkers that may only activate one ability per turn, you can instead activate two of Urza's abilities during each of your turns

Acid-Spewer Dragon Aether Poisoner Aetherblade Agent Age of Ultron Agent of the Fates Agent of the Shadow Thieves Ahriman Alchemist's Gift Alesha's Legacy Aphelia, Viper Whisperer Archetype of Finality Archpriest of Shadows Arisen Gorgon Armed Assailant Arnyn, Deathbloom Botanist Ashnod, Flesh Mechanist Aspect of Gorgon Assassin Initiate Avenger of the Fallen Baleful Eidolon Bane-Marked Leonin Barrowgoyf Battle-Rage Blessing Battlefly Swarm Bebop, Skull & Crossbones Bilious Skulldweller Bitterheart Witch Black Widow, Deadly Hunter Blacklance Paragon Bladebrand Blight Titan Blightwing Bandit Bloodthirsty Conqueror Body Launderer Bone Picker Bonepicker Skirge Boot Nipper Burrog Banemaker Cackling Culprit Cackling Slasher Cacophony Unleashed Cairn Wanderer Call of the Death-Dweller Canyon Crawler Carnival Carnivore Case of the Gorgon's Kiss Cecil, Dark Knight Citystalker Connoisseur Coat with Venom Corpse Blockade Corrupted Key (playtest) Covetous Geist Crossbones, Malicious Mercenary Crossway Troublemakers Cruel Grimnarch Cultist of the Absolute Daggerfang Duo Damocles Base, Sword of Kang Deadly Allure Deadly Wanderings Death Baron Deathcap Marionette Deathgaze Cockatrice Derelict Attic // Widow's Walk Derelict Attic // Widow's Walk Dhund Operative Dire Fleet Poisoner Dire Fleet Ravager Diregraf Scavenger Egon, God of Death Egrix the Bile Bulwark Elvish Dreadlord
