The save is a constitution save, so your target must roll a d20 and add their con modifier to that. If their roll + modifier is the same or higher than your spell save DC, then the spell has been surpassed and the effects do not work. For some spells, like fireball, the save is only for half damage.
How do you fail a saving throw?
No. There is no specific way to pass on or intentionally fail a saving throw given. You don’t normally decide to make a saving throw; you are forced to make one because your character or monster is at risk of harm. (BD&D 62).
Can you Eldritch Blast objects?
“real life is a super high CR.” Rules as written, eldritch blast can not target objects (same for other spells unless they specify otherwise i.e. fire bolt).
What happens when you make a saving throw?
From the Basic Rules on spellcasting: Many spells specify that a target can make a saving throw to avoid some or all of a spell’s effects. The spell specifies the ability that the target uses for the save and what happens on a success or failure.
When do animated objects not get a saving throw?
If the selected item is not carried or worn and is not magical, it does not get a saving throw. It simply is dealt the appropriate damage. Animated objects count as creatures for purposes of determining their Armor Class (do not treat them as inanimate objects).
What happens if a creature rolls a natural 1 on a saving throw?
If a creature rolls a natural 1 on its saving throw against the effect, however, an exposed item is harmed (if the attack can harm objects). Refer to Table: Items Affected by Magical Attacks to determine order in which items are affected.
How are saving throws made in DND 5e?
Saving throws are made against a DC. From the 5e SRD: Many spells specify that a target can make a saving throw to avoid some or all of a spell’s effects. The spell specifies the ability that the target uses for the save and what happens on a success or failure.