When it enters, you reveal cards from the top of your library until you find X permanents, where X is the number of colors among permanents you control
Add a red card that cares about creatures dying and you have a little engine going
Realmwalker is an exceptional one-size-fits-all changeling for typal decks that lack card advantage
In a deck that wants to play things from exile - of which there are many - these are just upgraded clue tokens, because they not only cost no mana, but also have so many synergies in Commander with cards like Laelia, the Blade Reforged, who gets stronger whenever you put cards into exile
Whether you're a seasoned collector or just starting, here are some tips to consider: Research: Stay updated on market trends and card values
White is vigilance, Blue is hexproof, Black is lifelink, Red is first strike and Green is trample