New Standard legal keywords (as of five years ago, defined roughly as when Tenth Edition came out) are as follows:
Enchant (foo) (Enchant permanents are now Auras with this ability. As always, if it's enchanting something that isn't foo, it dies.)
Lifelink (This dealing damage makes you gain that much life.)
Deathtouch (When this damages a creature, that creature is destroyed.)
Reach (This can block fliers)
Flash (You can play this whenever you could play an instant)
Shroud (This can't be targetted)
Cycling (Yes, they brought it back again. Landcycling, too.)
Exalted (Whenever a creature you control attacks alone, it gets +1/+1 until end of turn. This stacks with other instances of itself.)
Unearth (cost) (When this is in your graveyard, you can play it for its unearth cost. At end of turn, RFG. If it would leave play for any reason, RFG. Unearth only as a sorcery.)
Devour (number) (As this comes into play, you may sacrifice any number of creatures. Put (number) +1/+1 counters on this for each creature it devoured.)
Domain (Ability word. Counts number of basic land types among your lands. Only appeared in one set.)
Cascade (When you play this, reveal cards from the top of your library until you reveal a nonland card with CMC<this. You may play that card without paying its mana cost. Put all other revealed cards on the bottom of your library in a random order.)
Landfall (Ability word. When you play a land, stuff happens.)
Kicker (Also back.)
Multikicker (Kicker you can pay any number of times.)
Level up (cost) (Cost: Put a level counter on this. Level up as a sorcery. Power, toughness, and abilities are dependent on what level the thing is. Note that it starts at level 0. Level = number of level counters on it.)
Totem armor (Only on Auras. Whenever the enchanted permanent would be destroyed, this Aura is instead. Effectively one-shot indestructibility.)
Annihilator (number) (Whenever this attacks, defending player sacrifices (number) permanents.)
Mechanical themes of a non-keyword persuasion:
Colored artifacts (mostly in white, blue, and black)
Power 5 or more matters
Multicolor matters
Allies (Creatures with type Ally with abilities that either trigger when your Allies enter play (itself included) or scale based on the number of Allies you control. Or both.)
Vampires (Yeah, they're the new non-Human black dorks. Go figure.)
Lands matter (Seriously. Lands are kind of awesome in the first two sets of this year.)
Walls matter (Again, seriously. Among other things, the new set has a wall that can ping the opponent for damage equal to the walls you control. And a white Wall of Blossoms.)
Eldrazi Spawn (0/1 colorless tokens you can sacrifice for one mana apiece. Useful for calling up their ridiculously expensive elders.)