Vulturous Aven doesnt read super impressively, but its combination of a high value Exploit spell, flying, and decent stats made it arguably the strongest common black creature in Dragons of Tarkir
Certain features from Live , like Resistance and Pokemon V cards, are absent in Pocket
These take effect as explained by the text on the card
Another notable negative is the fact that its pre-evolution is incredibly weak
Bouncing back to your hand isn't as bad as sacrificing a creature, but the effect still sets you back in a big way and can be followed up with a nasty counterspell
Static abilities that affect the Soldier's power and toughness may change this, but Ancestral Blade will be attached to the Soldier before the game checks to see if it has toughness 0 or less