Invasion of Zendikar has a 3 in a star in the bottom right of the text box, similar to a planeswalkers loyalty
Copperhorn Scout: good if your opponent is tapping your creatures before combat
This prevented people from using it to completely clear someones board of lands, since theyd presumably have a few basics laying around
The Deck of Many Things Your one-shot is just a d20 die-roll away with The Deck of Many Things
Now, that will be expressed with a Finality Counter that can be moved, removed or otherwise manipulated
This artifact has a fun story attached to it, too: Originally, Skullclamp was designed to give a +1/+1 buff, but before seeing print the Magic designers thought that such a buff would make Skullclamp too powerful and they changed it to +1/-1