Bolster
Bolster is a keyword action introduced in Fate Reforged where it replaced Outlast from Khans of Tarkir as the mechanic associated with the Abzan Houses. [1] When Bolster = x, you choose a creature with the least toughness or tied with the least toughness among creatures you control and put X +1/+1 counters on it.
Rulings
- Bolster is not targeted.
Example
Template:Clans of Tarkir mechanics