Thankfully, white and black have plenty of fantastic options for removing most permanents
Archon of Sun's Grace Archon of Sun's Grace is a 3/4 flying lifelink creature that makes you a 2/2 flying lifelinker every time you trigger constellation
Cheaper extra turn spells are your friend here
Yet, there are some ways to go about casting this for a lot less than the actual costCounterlash, Magus of the Mind, Mind's Desire, Scholar of the Lost Trove, Sins of the Past, and Spelltwine all come to mind
If a card is modified with an art sticker, its art is no longer the same art as its original card
Toss in the fact that Thalia, Guardian of Thraben already has several printings including a WMCQ Promo with unique art and I'd guess that the pricing of the different versions of Thalia, Guardian of Thraben will look much like the pricing of the different Secret Lair printings of Serum Visions with the one with the most desirable art being slightly more valuable than the rest, but the total value ending up right in the $30 or $35 range
