mtg power equal to cards in hand Promise of does this card only get

You could also look at +1/+1 counters to really beef up those tokens

The deck has two main goals: to build a large army of human creatures, and to pump the army of humans through dozens of anthem and +1/+1 counter effects, allowing you to attack with a massive army of huge creatures

The transformation doesn't necessarily make the card more powerful, but it maintains Flash, adds Double Strike, meaning you double the damage output in combat, and shifts the card draw from opponents drawing two cards per turn to combat damage dealt to players

Green is especially great at destroying things that aren't creatures

Many cards have Shift or abilities that rely on certain types and numbers of characters being in play (we're looking at you, Seven Dwarfs)