The Great Plains

{t} : Add {w}
{3}{w}, {t} : Put a +1/+1 counter on target
Train creature you control. That creature gains Bulk 1-{w} until end of turn. (If a train
has bulk and a +1/+1 counter on it, you may remove a +1/+1 counter from it and tap it. If you do, create a token that is a copy of that creature. Activate as a sorcery.)