If enough -1/-1 counters are put on a creature you control at the same time to make its toughness 0 or less, Host of the Hereafter's last ability will see all of the +1/+1 counters it had when it died as well as the -1/-1 counters it had, and the same number of each of those types of counters (plus any other applicable counters) will be put onto the target creature
Set sizes have varied over the years, but many modern-era sets fall somewhere between 200 and 250 total cards
Otherwise, if you are using FireRed Version 1.1, you need to put the Master code as well as the Anti-DMA before entering the rare candy cheat code
Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done
#80 Slowbro
These form a good basis on which we base our attacks