Specifically, the ability can trigger twice each turn for each creature you control, not just twice total
Shadowy Darkness Energy 83/84 Loading
Its not exactly a fair comparison because the original Modern Masters came out two years ago, but heres what the cream of the crop from that set looks like today: Path to Exile $7.79 Spell Snare $5.69 Kitchen Finks $3.99 Lightning Helix $3.85 Manamorphose $3.69 Electrolyze $3.59 Mind Funeral $3.29 Eternal Witness $2.89 Lava Spike $2.69 (common) Rift Bolt $2.29 (common) Paradise Mantle $1.15 Relic of Progenitus $1.15 Street Wraith $0.99 (common) Narcomoeba $0.99 Total = $44.04 Thats a very similar 3/102 commons (2%) and 11/60 uncommons (18%)
ZEXAL anime [5] who is working to gather the "Numbers" to save the Barian World
You could also get it at Home Depot for about $15
If Assault // Battery would hit the graveyard, Magnivore would get pumped by 1/1, not 2/2, since its ability counts sorcery cards and Assault/Battery is one card, not two