Released in 2002, ONSLAUGHT is the first set in the ONSLAUGHT BLOCK (Onslaught, Legions, Scourge). This is a 350 card set.
Set Breakdown:
110 Rares
110 Uncommons
110 Commons
20 Lands
Look for the following key cards:
Akroma's Vengeance
Blistering Firecat
Bloodstained Mire
Cover of Darkness
Elvish Vanguard
Enchantress's Presence
Exalted Angel
Flooded Strand
Goblin Piledriver
Goblin Sharpshooter
Insurrection
Jareth, Leonine Titan
Kamahl, Fist of Krosa
Polluted Delta
Silvos, Rogue Elemental
Visara the Dreadful
Windswept Heath
Wooded Foothills