Hermetic Study/Psionic Gift ( Saga/Legacy/Destiny & Odyssey/Torment/Judgment ) In both sets, these cards served a similar purpose: kill small creatures or allow your smaller creatures to threaten large ones in combat (for instance, Hermetic Study would allow your 2/2 creature to attack into a 3/3 creature with the threat of your third Hermetic Studied creature sweeping away the 3/3 should it block)
The "Bleed" option extends the card image beyond its normal borders, filling the extra space around each card
Lumra, Bellow of the Woods Green and lands go way farther back than the start of Arena, and going forward there's certainly more green cards with amazing landfall abilities, and more than enough ramp to make 6-mana value creatures like Lumra, Bellow of the Woods feel easy to cast
Atarka works best in Dragon tribal decks that want to attack early and often
Fallen Ferromancer, Prologue to Phyresis, and Norn's Decree may not be the most efficient, but they lay down good tracks for red, white and blue's proliferate train
Grave PactGrave Pact is also a nice choice for Grimgrin, since he sacrifices creatures
