You can go infinite with Earthcraft, a Forest enchanted with a Wild Growth and an Ashnod's Altar using Slimefoot
I am just not somebody who necessarily needs to play the best, most optimized deck
If the opponent only controls Defense Position monsters, then Black Tyranno can attack directly, and with 2600 original attack points, this is no joke
If the copied permanent is copying something else, then the tokens enter the battlefield as whatever that permanent copied
Creatures (11) 2 Lyra Dawnbringer 2 Raff Capashen, Ship's Mage 1 Lavinia, Azorius Renegade 4 Fblthp, the Lost 2 Tomik, Distinguished Advokist Planeswalkers (11) 1 Karn, Scion of Urza 3 Teferi, Hero of Dominaria 2 Dovin, Grand Arbiter 3 Teferi, Time Raveler 2 Saheeli, Sublime Artificer Lands (24) Spells (14) War of the Spark gives us a saturation of legendary permanents that boosts the legendary sorceries from Dominaria