[REDACTED], R&D Sycophant

Flying, deathtouch, lifelink, menace, ward {10},
definitely-not-designed-for-commander, infect

When [REDACTED] enters the battlefield and at
the beginning of your upkeep and at the beginning
of combat on your turn and at the beginning of your
end step, exile the top card of each player's library.
Then you may pay {w}{u}{b}{r}{g}. If you do, cast any
number of cards exiled this way without paying their
mana costs. This is definitely fun for your opponents
and will not slow the game to a crawl.