Playing an extra land ramps you, and these decks usually have high land counts
Split Stock/Layers: During cardstock manufacturing there are sometimes errors that result in the sheets layers not getting properly adhered to one another
Card advantage can also refer to removing your opponent's access to cards
Being able to sac one of your own Gobby tokens in order to destroy an opponents powerhouse artifact combo piece or game-warping colorless permanent is quite an impactful trade-off, so if you keep losing to Chimil, the Inner Sun or The Immortal Sun (or other, non-Sun-related artifacts), nab a copy of this bruiser and profit mightily
So you can basically attack blindly with this card, and every time he dies, you draw a bunch of cards if Jenova is on the board
Delney also gives each creature under their protection evasion, enabling them to avoid being blocked by creatures with power 3 or greater, making swarms of 1/1 and 2/2 tokens into serious threats against most boards