Oh, and untapped Dragons you control have hexproof
The flexibility of this ability - and the fact that you can hit each one in a single turn in the right deck - means youll be generating absurd value constantly, just by playing other creatures or making creature tokens
From now on, whenever you look at your opponents side of the play area, and you see a Cheatyface, know that its on you
If you win the flip, exile the chosen creature
So why would you play four
In terms of actual Legendary cards, however, the games designers are a little more selective, with only 12 cards making the coveted cut in Into the Inklands