Chaos End refreshes the board if you should fall behind, and Nobleman of Extermination banishes opposing battle traps
Bloodthirsty Conqueror + Starscape Cleric There are dozens of combinations that might suit you beyond the infamous Exquisite Blood, and Sanguine Bond
Mechanics-wise its pretty good, too
While the sky-high market price is accurate as to what you may pay for an NM copy, a damaged card sold for $869.76, while one in MP condition sold for $1,250 leaving the market price's estimation as a fair value for Rayquaza.
It's still a land.3: Return target permanent card from your graveyard to your hand.6: You get an emblem with "Whenever a land you control enters, you may draw a card." Number 163 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (9/20/2016) You can activate Nissa's first ability targeting a land that's already untapped
A 5-mana 6/6 flier is fine, though a step down from Doom Whisperer and the like