Nasty's Sideboard Guide

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Izzet Delver:

In: 2x Stormbound Geist, 2x Shrivel, 1x Dispel

Out: 4x Daze, 1x Spell Pierce (sometimes leave in Daze if the opponent does not seem like they going to be playing around Daze - play/draw consideration possible)

Tron:

In: 2x Stormbound, 1x Dispel, 2x Relic of Progenitus (Annul or Hydros may be good, depending on Tron build)

Out: 4x Daze, 1x Spell Pierce (Black removal spells can be SB'd out too)

Kuldotha Boros:

In: 2x Relic, 2x Stormbound, 2x Annul (1x Dispel, 1x Hydro if cutting 2xDaze, 2x Hydro more if cutting 2x Git Probe)

Out: 2x Daze, 2x Snuff Out, 1x Ghastly Demise, 1x Disfigure (or cut the other 2x Daze + 2x Git Probe)

Mono-U Delver (same as against Izzet):

In: 2x Stormbound Geist, 2x Shrivel, 1x Dispel

Out: 4x Daze, 1x Spell Pierce (same comment about keeping these in for shaving other cards)

UB Control:

In: 2x Relic, 2x Stormbound Geist, 1x Dispel

Out: 1x Ghastly Demise, 2x Snuff Out, 2x Echoing Decay

Izzet Blitz:

In: 4x Hydroblast, 1x Edict, 1x Dispel

Out: 2x Counterspell, 2x Daze, 1x Echoing Decay, 1x Thought Scour (playing/draw more Dazes/Counterspells)

Affinity:

In: 2x Annul, 4x Hydro, 1x Dispel, 1x Edict

Out: 1x Disfigure, 3x Echoing Decay, 3x Daze, 1x Thought Scour (or 1x Spell Pierce)

Inside Out:

In: 1x Dispel, 2x Stormbound, 2x Relic (Relic to empty out GY against Circular Logic and to kill Undying Stormbound Geists)

Out: 1x Daze, 1x Counterspell, 1x Echoing Decay, 2x Preordain

RW Winnie (Boros Bully):

In: 1x Echoing Truth, 2x Relic, 2x Stormbound, 2x Hydro, 1x Dispel (bring in 2xShrivel if opponent skimping on +0/+1 effects)

Out: 1x Disfigure, 1x Ghastly Demise, 2x Snuff Out, 2x Daze, 1x Git Probe

Elves:

In: 2x Shrivel (maybe 2x Annul for Spidersilk, but don't think it's worth it)

Out: (some combination of Daze, Probe, or Spell Pierce)

Burn:

In: 4x Hydro, 1x Dispel

Out: 1x Probe, 2x Snuff Out, 1x Disfigure, 1x Echoing Decay,

UB Delver/Angular (mirror):

In: 1x Dispel, 2x Stormbound, 2x Relic

Out: 2x Snuff Out, 1x Ghastly, 2x Daze

Mono-B Control:

In: 2x Stormbound, 1x Echoing Truth, 1x Edict, (possibly but probably not: 2x Relic, 1x Dispel, 2x Annul)

Out: 2x Snuff Out, 1x Ghastly, 1x Daze (1x Disfigure 1x Preordain, and/or 1x Spell Pierce if bringing in Annul or other)

Bogles:

In: 2x Annul, 1x Edict, 2x Shrivel, 1x Echoing Truth

Out: 2x Echoing Decay, 1x Disfigure, 2x Snuff Out, 1x Ghastly (all the black removal)

Goblins (RDW):

In: 4x Hydro, 1x Dispel, (1x Shirvel)

Out: 2x Snuff Out, 2x Git Probe, 1x Spell Pierce, (1x Disfigure)

Stompy:

In: 2x Annul, 1x Dispel, 1x Shrivel

Out: 2x Git Probe, 1x Counterspell, 1x Daze (probably keep in: 1x Spell Pierce)

Mono-W Heroic:

In: 2x Annul, (1x Dispel, 1x Edict probably not necessary)

Out: 1x Spell Pierce, 1x Daze, (1x Counterspell)

WB Pestilence:

(against creature-lite build)

In: 1x Edict, 2x Annul, 2x Relic, 2x Stormbound, 1x Echoing Truth

Out: 7x Black removal, 1x Daze

(against creature build)

In: 2x Annul, 2x Relic, 2x Stormbound

Out: 2x Snuff Out, 1x Echoing Decay, 1x Disfigure, 1x Spell Pierce, 1x Git Probe