I was attacking with a beast token from "Best ial Incursion", that had a "Hunter's Axe" equipped to it. I also had "Yoshimaru, Scrappy Stray" on the battlefield, while I had 6 mana open. After attacking for lethal with my beast token, I used the axe's trigger in order to give it deathtouch. After the enemy player had declared blockers, I wanted to give the token a +1/+1 counter with Yoshimaru, which would have given me lethal damage, since the defending player had forgotten to take the +1/+1 counter into account. However the game instantly jumped to the assign combat damage phase and didn't let me use Yoshimaru's ability. After damage had resolved I was again able to use Yoshimaru's ability. This happened twice. I want my gems for this run back.