Deathtouch
Creatures dealt damage by something with deathtouch are destroyed.
Defender
Creatures with defender can’t attack.
Double Strike
A creature that has double strike deals damage twice in combat: once when creatures deal first-strike damage and again when creatures deal regular damage. It’s possible for damage dealt by a creature with double strike to destroy another creature before the other creature can deal its combat damage.
First Strike
Creatures that have first strike deal combat damage before other creatures. It’s possible for damage dealt by a creature with first strike to destroy another creature before the other creature can deal its combat damage.
Flying
Creatures with flying can’t be blocked except by creatures with flying or reach.
Forestwalk
A creature with forestwalk can’t be blocked if the defending player controls a Forest.
Haste
Creatures with haste ignore summoning sickness. They can attack and their abilities can be activated no matter when they entered the battlefield.
Hexproof
A creature with hexproof can’t be chosen as the target of a spell or ability controlled by an opponent, including Aura spells. If a spell or ability doesn’t use the word “target,” it may still affect a creature with hexproof.
Indestructible
An indestructible permanent can’t be destroyed.
If an indestructible creature has been dealt enough damage to destroy it, the creature is not destroyed. If an indestructible creature’s toughness is 0 or less, it’s still put into its owner’s graveyard.
Indestructible permanents can still be sacrificed, returned to their owners’ hands, exiled, or put into their owners’ libraries.