幼(よう)生(せい)の天(てん)文(もん)学(がく)者(しゃ)

When this creature enters, you may sacrifice a land. If you do, draft a card from the Planets Spellbook and put it onto the battlefield tapped.

: Add one mana of any color. If you control a Planet with twelve or more charge counters on it, add three mana of any one color instead.