Niv-Mizzet, a Guildpact

Flying, defender
All other untapped permanents can't be tapped.
All other tapped permanents can't be untapped.
Sorcery spells you cast gain flash. Instant spells
you cast gain "This spell can't be countered."
{w}{u}{b}{r}{g}, {t}: You draw a card and gain 1 life. Destroy target creature. Its controller loses 1 life. Target creature you control gains +2/+2 and
trample until end of turn.