Balasar, Voice of Bahumat

Vigilance, Hexproof
Balasar, Voice of Bahumat gets +1/+1 for each other dragon you control and dragons cost {1} less for each Cleric you control
{t} If you control 6 or more dragons, search your library and/or graveyard for Grand Master of Flowers or Tiamat. Reveal that card and put it into your hand