Creatures you control get +1/+0.
+1: Add or . Creature spells you cast this turn can’t be countered.
−2: Target creature you control fights target creature you don’t control.
Because it's a loyalty ability, Domri's first loyalty ability isn't a mana ability. It can be activated only any time you could cast a sorcery. It uses the stack and can be responded to.
03-05-2019
wotc
A spell or ability that counters spells can still target a creature spell you control after Domri's first loyalty ability has resolved. When that spell or ability resolves, the creature spell won't be countered, but any additional effects of that spell or ability will still happen.
03-05-2019
wotc
If either target is an illegal target as Domri's last ability resolves, no creature will deal or be dealt damage.
03-05-2019
wotc
If Domri leaves the battlefield before his last ability resolves, most likely because he only had 2 loyalty when you activated the ability, the creature won't have +1/+0 from Domri's static ability while it fights.
03-05-2019
wotc
After Domri's first loyalty ability has resolved, no creature spells you cast can be countered during that turn, not just the one you spend the mana on.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
or 
. Creature spells you cast this turn can’t be countered.
Raymond Swanland2019-12-16
