Steel Seraph Steel Seraph is a nice mix between a 3/3 and a 5/4 flier with relevant abilities, and granting lifelink to anyone, including this card, is a worthwhile addition
This is historically the most control colour combination, since both colours bring something important to the table - blue brings counterspells and draw, white brings point and mass removal
Plus, you might, occasionally, be able to blow up the world
In principle you're ending on either Bubble Reef or Marbled Rock, with or without Crystal Heart protection, plus some combination of Toadally Awesome, Marincess Wave, Torrential Tribute, and/or hand traps depending on the composition of your starting hand, usually with good follow up in the form of draws and resource recursion
This page shows current market prices, recent eBay sales, PSA graded values, and price history for this Rare Holo EX card from BREAKthrough