Ancient Silver Dragon April, Reporter of the Weird Arm-Mounted Anchor Azra Oddsmaker Battle Angels of Tyr Bebop, Skull & Crossbones Book Devourer Captain Howler, Sea Scourge Cold-Eyed Selkie Curie, Emergent Intelligence Damocles Base, Sword of Kang Diviner Spirit Fear of Failed Tests Foot Chopper Glenn, the Voice of Calm Glint-Eye Nephilim Hunter's Insight Hunter's Prowess Impaler Shrike Iymrith, Desert Doom Jolrael, Voice of Zhalfir Kain, Traitorous Dragoon Korvold, Gleeful Glutton Mask of Memory Mask of the Schemer Merfolk Windrobber Mighty Servant of Leuk-o Nael, Avizoa Aeronaut Neheb, Dreadhorde Champion Nimble Brigand Ogre-Head Helm Peema Trailblazer Professor Hulk Psychic Frog Robe of the Archmagi Sauron, the Dark Lord Sergeant John Benton Shadow, Mysterious Assassin Shoreline Looter Starwinder Sturmgeist Subterfuge Summon: Primal Odin Surrakar Spellblade The Gitrog, Ravenous Ride The Pride of Hull Clade Trash the Town Xyris, the Writhing Storm Zombie Cheese Magician

Return that creature to its owner's hand at the beginning of the next end step
You can alternate between removal and card advantage while beating down with your 3/4 planeswalker, and if its not enough, you can anthem on the +1 ability for ninjas
Squad can only exist on permanents since the card has to enter the battlefield to make copies