Formon Lavanster

Eminence - As long Formon Lavanster is on your command zone or on the battlefield , dragons
spells you cast cost {1} less for each Dragon in play.
Flying
If five or more differents Dragons attacks , exile
five of them and put into play a 10/10 Dragon legendary token named Munllhard , The First
Dragon with Haste, Flying, Trample, Indestructible and "When this creature leaves the battlefield, put all cards you own in exile
in your hand."