3 cards where the text includes “hexproof” and (the cards are colorless or the colors is GW) and it’s legal in Standard

Crystalline Giant {3}

Artifact Creature — Giant

At the beginning of combat on your turn, choose a kind of counter at random that Crystalline Giant doesn’t have on it from among flying, first strike, deathtouch, hexproof, lifelink, menace, reach, trample, vigilance, and +1/+1. Put a counter of that kind on Crystalline Giant.

3/3

Illustrated by Jason Rainville

Standard
Brawl
Pioneer
Historic
Modern
Pauper
Legacy
Penny
Vintage
Commander

Mirror Shield {2}

Artifact — Equipment

Equipped creature gets +0/+2 and has hexproof and “Whenever a creature with deathtouch blocks or becomes blocked by this creature, destroy that creature.”

Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Illustrated by Dan Scott

Standard
Brawl
Pioneer
Historic
Modern
Pauper
Legacy
Penny
Vintage
Commander

Shadowspear {1}

Legendary Artifact — Equipment

Equipped creature gets +1/+1 and has trample and lifelink.

{1}: Permanents your opponents control lose hexproof and indestructible until end of turn.

Equip {2}

A weapon of darkness for a warrior of light.

Illustrated by Yeong-Hao Han

Standard
Brawl
Pioneer
Historic
Modern
Pauper
Legacy
Penny
Vintage
Commander

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.