To proliferate, you choose any number of permanents and/or players, then give each another counter of each kind already there.) A player commits a crime as they cast a spell, activate an ability, or put a triggered ability on the stack that targets at least one opponent, at least one permanent, spell, or ability an opponent controls, and/or at least one card in an opponent's graveyard
All you need in order to help is either some level of familiarity with the TCG, or a willingness to learn, along with a good design sense
This can greatly affect the way your opponent will block your attacks
Ghired, Conclave Exile and Trostani, Selesnya's Voice decks will LOVE a 4/4 flying token to copy a bunch of times, while also mana-fixing in the process
All planeswalkers have a number of loyalty counters that they enter the battlefield with upon being cast called starting loyalty. Ashiok, Sculptor of Fears enters the battlefield with 4 loyalty counters