The card also has Cypher, meaning that in theory you can do this every combat
It's also possible to open 1 of 13 borderless mythic rare cards (1%)
Join us for an afternoon of playing the Pokmon trading card game, trading cards, and doing a special card themed craft
often also competitive Cube and Commander
Pushing your deck above 60 (or 40) cards makes it harder to find key cards, increases the risk of "mana flood" (drawing only lands, so you have nothing to cast) and "mana screw" (drawing too few lands, so you can't cast any of the spells in your hand), and makes it more likely that you'll draw unplayable hands
Its better than proliferating because the creatures dont have to already have the +1/+1 counters on them (although it obviously isnt going to help with other kinds of counters)