If Weapon Rack has left the battlefield or has no +1/+1 counters on it by the time its activated ability resolves, you won't put a +1/+1 counter on the target creature
There are blister packs, booster packs, booster boxes, theme decks, and all the differences between them can be confusing
Print bleeding To accommodate for print bleeding (yellow border area on image), there is an additional 72 pixels removed from each dimension (36 pixels each side based on a 300DPI image) , therefore you will see 36 pixels cut off each side of your images that you upload
It has various currencies to give you a boost when building a collection
A good example is versus the white-blue deck we talked about earlier
Here are some quick tips to get you started