Whenever this creature attacks, you may sacrifice another creature or artifact
And consider Land Fetch spells - Rampant Growth saves you one mana but only gets you one Land
White has plenty of better ways to pump your creatures, even with +1/+1 counters such as Cathars' Crusade, Collective Effort, and in specific decks Archangel of Thune / Metallic Mimic works too
The boundary between real and imaginary is as thin as the page, and just as easily torn
These are not to be confused with proxies, cards used as stand-ins for the real thing for the purpose of testing or to keep valuable cards out of decks and safe
Ideally Dorat would have rules text along the lines of Brothers Yamazaki or Seven Dwarves, capping the number you can have at three