Hey guys, I've been playing RUG Delver for the past few months with this list and I'm absolutely sold on Spell Snare. It counters all the big problems for this deck; Rest in Peace, Thalia, Stoneforge, Jitte, Baleful Strix, etc.

Creatures - 11
4 Nimble Mongoose
4 Delver of Secrets
3 Tarmogoyf

Spells - 31
4 Force of Will
4 Daze
4 Brainstorm
4 Ponder
4 Lightning Bolt
4 Stifle
1 Preordain
1 Chain Lightning
1 Forked Bolt
2 Spell Pierce
2 Spell Snare

Lands - 18
3 Polluted Delta
3 Flooded Strand
2 Wooded Foothills
3 Volcanic Island
3 Tropical Island
4 Wasteland

Sideboard
2 Surgical Extraction
1 Flusterstorm
1 Winter Orb
1 Ancient Grudge
1 Destructive Revelry
1 Null Rod
2 True-Name Nemisis
1 Vendilion Clique
1 Sylvan Library
1 Sulfur Elemental
1 Pyroblast
1 Red Elemental Blast
1 Submerge