Galadriel, Light of ValinorGaladriel, Light of Valinor decks love cards with strong entering the battlefield abilities, so adding an effect like Boomerang Basics to the mix, allows you to utilize it as either an offensive or value centered effect
Legality depends on the tournament format -- Split Decision can be legal in some formats and banned or restricted in others
The Mega Evolution sets released on August 1 in Japan and are hitting English markets on September 26
You are able cast either one and unlock it, meaning its effect happens right away
Intermediate Counter Burn - how it looked a year ish ago after M12 hit 24 Spells Lightening Bolt Burst Lightening Ancestral Visions Spell Pierce Remand Fire / Ice Arc Trail Arcane Denial Counterspell Lat-Nam's Legacy Chandra's Phoenix Vendilion Clique Manic Vandal Sea Gate Oracle Jace, the Mind Sculptor Chandra, the Fireheart Cryptic Command Time Warp Treachery Force of Will Inferno Titan Wurmcoil Engine Consecrated Sphinx Rolling Earthquake 16 Lands Izzet Boilerworks Volcanic Island Steam Vents Scalding Tarn Shivan Reef Cascade Bluffs Faerie Conclave 3 Mountains 6 Islands Counter burn had risen to the best control deck and arguably the best archetype in my cube and then they went and released Innistrad block which is probably the single biggest block in terms of contributing power cards to the archetype
When it comes to Set Boosters, your odds are improved, but Im sad to say that I dont have enough information to give you a percentage