Revalor, Intermediate

Whenever a land enters the battlefield under your control create a 1/1 green elf if it's a forest and a
1/1 white human if it's a plains.
Tap three untapped elves under your control:
Put a plains and a forest from your library into
your hand
Tap three untapped humans under your control:
You may play two extra lands this turn
{2}{g}{g}{g}{w}{w}{w}: Humans and elves you control
get +3/+3 until the end of the turn