Riftbound keyword
Mighty
Mighty is a Riftbound keyword: a unit is Mighty while it has 5 or more Might. No unit has it as an ability; cards check for it or trigger when a unit becomes Mighty.
12 cardsFirst seen in OriginsCore Rules 706
Official text
On the cards
When you play a Mighty unit, you may exhaust me to channel 1 rune exhausted. (A unit is Mighty while it has 5+ 
Might.)
While I'm Mighty, I have Deflect, Ganking, and Shield. (I'm Mighty while I have 5+ Might.)
Core Rules
- 707
- Mighty is a description that applies to some units. Other game effects can check whether a unit is Mighty.
- 708
- A Unit "is Mighty" as long as its Might is 5 or greater.
- 709
- A Unit "becomes Mighty" at the moment its Might changes from being less than 5 to being 5 or greater.
- 710
- Units on the board are evaluated according to their current Might.
- 711
- Units in Non-Board Zones are evaluated according to their printed Might.
Riftbound Core Rules, updated October 9, 2026
How Mighty works
What makes a unit Mighty?
Having 5 or more Might right now, counting everything that raises or lowers it. It stops being Mighty the moment its Might drops below 5.
Core Rules 708, 710
Is Mighty an ability units have?
No. Cards highlight Mighty like a keyword, but it only describes a unit with 5 or more Might. No unit has it as an ability; other cards check whether a unit is Mighty.
Core Rules 707, 801.2
What does “becomes Mighty” mean?
It's the moment a unit's Might goes from less than 5 to 5 or more. A unit that's already Mighty and grows bigger doesn't become Mighty again, so cards that trigger on it, like Fiora, Worthy and Grand Duelist, only trigger again after it drops below 5 and climbs back.
Core Rules 709
Do temporary boosts and buffs count?
Yes. Units on the board use their current Might, so a 3 Might unit given +3 Might this turn is Mighty until the boost ends. Each buff adds 1 Might too.
Core Rules 710, 703
Is a card in my hand, deck or trash Mighty?
Only if its printed Might is 5 or more. Off the board, cards use their printed Might, whatever happened to them on the board. That's what Raving Witness checks when it reveals the top card of your deck.
Core Rules 711
Does Unsung Hero's “If I was Mighty” use the Might it died with?
Yes. A past-tense Deathknell looks back to the moment it triggered, just before the unit went to the trash, so Unsung Hero counts the Might it had then, boosts and buffs included, not its printed 2 Might.
Core Rules 808.1.c.2, 808.1.d.3
Example: Fiora gets a buff
Fiora, Victorious has 4 printed Might and reads “While I'm Mighty, I have Deflect, Ganking, and Shield.” Give her a buff and she has 5 Might, so she's Mighty and gains all three keywords. When she defends, Shield adds 1 more, for 6 Might. Without the buff, she's a plain 4 Might unit with none of them.
From Riftbound Core Rules
Every Mighty card (12)
kw:mighty
