mtg card protector 1000CT Sleeves, Clear Front Textured Back Card Sleeve Deck Card Protectors, Standard Size Card Sleeves for MTG, Baseball Card, Football Card,Sports Cards, Game Card : Toys & Games Ayula, Queen Among Bears 2/2 protecting collectible cards Choose Product(s):FAN BUNDLE: Physical Cards + Canvas 11x14"

mtg card protector 1000CT Sleeves, Clear Front Textured Back Card Sleeve Deck Card Protectors, Standard Size Card Sleeves for MTG, Baseball Card, Football Card,Sports Cards, Game Card : Toys & Games Ayula, Queen Among Bears 2/2 protecting collectible cards Choose Product(s):FAN BUNDLE: Physical Cards + Canvas 11x14"

Ayula, Queen Among Bears Commander Deck - Green BEARS Magic MTG - Ready-to-Play | eBay

It’s better than proliferating because the creatures don’t have to already have the +1/+1 counters on them (although it obviously isn’t going to help with other kinds of counters)

2/2

Choose Product(s):FAN BUNDLE: Physical Cards + Canvas 11x14"

Of course, there is also Will of the Planeswalkers to consider

protecting collectible cards