Players are pairing Hare Apparent with the MTG commander Baylen the Haymaker, and it's not just for the rabbit flavor
However, Liliana, the Last Hope pairs perfectly with Grim Flayer in this situation by shrinking the Sylvan Advocate
As you may have guessed by now, the best creatures to cheat into play are typically high-cost, game-changing ones that can dramatically impact the battlefield
The first is a quadruple minotaur tutor (a minotutor, if you will), which is obscene, but clearly balanced by the power level of the creature type it's associated with
Enchantment Elephant Grass Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Black creatures can't attack you
Chief of the Scale is similarly relevant, though less so because you want to be aggressive with warriors