Back Which Mega Rayquaza ex build is the best
SR Super Rare UR Ultra Rare SE Secret Rare UL Ultimate Rare PS Platinum Secret Rare CR COLLECTOR'S RARE QCSE Quarter Century Secret Rare Branded Opening X SPELL Quick-Play Discard 1 card, then take 1 "Despia" monster from your Deck, and either add it to your hand or Special Summon it in Defense Position, also for the rest of this turn after this card resolves, you cannot Special Summon from the Extra Deck, except Fusion Monsters
This is a great pickup for +1/+1 counter lovers, just know that its a little on the basic side
If I had to think of a downside to this set (which was damn near impossible), it would be this
Niv-Mizzet, Parun is the third version of the Izzet guildmaster: the previous two versions were Niv-Mizzet, the Firemind and Niv-Mizzet, Dracogenius
For one White, Blue, Black, and Green mana nets you a 4/4 Legendary Phyrexian Angel Horror with flying, vigilance, deathtouch, lifelink, and the ability to proliferate at the beginning of your end step