Effects that modified that creature when it was previously on the battlefield won't be copied
Play Boosters were introduced to merge the functions of the now-discontinued Set and Draft Boosters of the past
Sacrifice is ever a popular staple strategy of Commander as well, which this can shut down handily and still offer a stronger burst of graveyard hate in a pinch
Garland, Knight of Cornelia / Chaos, the Endless Cards that are good early and late arent to be underestimated
They all think that keeping mum, that shredding their documents, that tossing knowledge down trash chutes and into rat-infested sewers is good enough to cover their trails
Here, Im sticking to ally creatures, so I wont consider token-makers like United Front, Gideon, Ally of Zendikar, or Retreat to Emeria