HS Unleashed (2010) Unleashed focused on raw elemental power, with Primes like Kingdra, Crobat, and Steelix leading the charge
Defiant Strike is best cast after blockers are declared so you can pump your creature and possibly destroy the blocking creature while also being able to draw a card
Fairy Godmother has probably the most confusing text for new TCG players
Aphetto Vulture Arcbound Condor Battlefield Percher Belbe's Percher Blacksnag Buzzard Bone Picker Buzzard-Wasp Colony Carrion Crow Carrion Screecher Circling Vultures Crow of Dark Tidings Death's-Head Buzzard Dunland Crebain Francisco, Fowl Marauder Gorging Vulture Gravewaker Lion Vulture Maha, Its Feathers Night Moseo, Vein's New Dean Necromancer's Familiar Pestilent Kathari Pit Raptor Poultrygeist Raven Eagle Raven of Fell Omens Screeching Buzzard Shriekdiver Silumgar Scavenger Sinkhole Surveyor Skeletal Kathari Sootfeather Flock Sultai Scavenger Vrock Vulturous Aven Wake of Vultures
Market research showed that hybrid mana was the highest-rated thing in the original Ravnica block, and I believe it is still one of the highest-rated "mechanics" (it's a tool, not a mechanic, but that's what the market research called it), if not the highest, of all time
While most double strike creatures rely on a pump spell in order to devastate the opponent, Drizzt rewards you simply for playing bigger threats