When a creature fails a saving throw against a spell that you cast, you can expend one Battle Die as a Bonus Action to daze the target. Until the start of your next turn, the target's Speed is halved and it subtracts the Battle Die from the next attack roll it makes.
{
"name": "Staggering Spell",
"__prop": "optionalfeature",
"source": "ValdaSpire24Extras",
"entries": [
"When a creature fails a saving throw against a spell that you cast, you can expend one Battle Die as a {@variantrule Bonus Action|XPHB} to daze the target. Until the start of your next turn, the target's {@variantrule Speed|XPHB} is halved and it subtracts the Battle Die from the next attack roll it makes."
],
"featureType": [
"MV:MS"
]
}