Islandwalk (This creature can't be blocked as long as defending player controls an Island.)All lands are Islands in addition to their other types.Creatures without flying or islandwalk can't attack.
FlyingArctic Aven gets +1/+1 as long as you control a Plains.: Arctic Aven gains lifelink until end of turn. (Damage dealt by this creature also causes you to gain that much life.)
Gain control of target creature until end of turn. Put a +1/+1 counter on it and untap it. That creature gains haste until end of turn. (It can attack and this turn.)
When Liliana's Shade enters, you may search your library for a Swamp card, reveal it, put it into your hand, then shuffle.: Liliana's Shade gets +1/+1 until end of turn.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)Whenever a creature you control attacks alone, you may tap target creature.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.): Regenerate Duty-Bound Dead. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)