Snow Celestial

When Snow Celestial enters the battlefield,
Find 4. (Exile the top four cards of your library
face-up, then create a colorless Scrap artifact token
for each land card exiled this way. Scrap tokens have
"Exile this artifact: Add one mana of any color".)
Heritage - Snow Celestial can't be blocked as long
as you control three or more historic permanents.