If a card with a renew ability is put into your graveyard during your turn, you can activate that ability if it's legal to do so before any other player can take any actions
Illustrated by Vincent Christiaens Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
Unfortunately, there are just better and quicker ways to make 100,000,000 tokens besides getting an additional 1/1 soldier each time, and I dont personally like swinging in with a commander whose power and toughness are so volatile
The interface has also been growing to accommodate the players who have been shut in their houses by the COVID-19 pandemic and ensuing lockdowns
It doesnt matter if its an enter the battlefield, combat, or activated ability, you get to double it up
You'll get any nontoken permanents your opponents sacrifice or discard