If, for example, you move a +1/+1 counter to a Wall of Roots, it must become a -0/-1 counter
For example, players could have multiple accounts across different devices solely for the purpose of hoarding all of their rare cards on their main account
As I explained above, we want every slot to have the potential for excitement, so here's what we've done with the art cards
Akroma, Angel of Wrath Akroma, Vision of Ixidor Angry Mob Appeal // Authority Baffling End Bant Battlemage Bringer of the White Dawn Concerted Effort Devouring Sugarmaw Elder Land Wurm Firehoof Cavalry Heroic Charge Iron Tusk Elephant Jhovall Rider Kenrith, the Returned King Kenrith, the Returned King Lancers en-Kor Leonardo, the Balance Mirror-Sigil Sergeant Moorish Cavalry Noble Elephant Odric, Lunarch Marshal Prized Elephant Salvation Colossus Thraben Militia Thunderous Orator War Elephant Wayward Angel Zetalpa, Primal Dawn
In other words, it wants to die