Sentry Oak | Illustration by Warren Mahy This isnt really a broken space, as the only ways to get around the restriction on walls and defenders attacking are printed on cards that explicitly let you do that
What if it just grants a creature type
Not only is Tidus, Blitzball Star a decent artifact build-around, but its one of my favorite Limited card designs: a Master of Diversion
I significantly prefer Yavimaya Elder to Simulacrum
10 Refurbished Familiar One-Mana Forced Discard Although Refurbished Familiar costs four mana, more often than not, you'll be casting it for much less, usually just one black mana
2 Wall of Roots, Vine Trellis, Sylvan Caryatid, and Overgrown Battlement History has shown that a 2-drop Wall that accelerates your mana while providing a strong roadblock ends up being something in Standard