Return to Ravnica, one of the more recent Magic: the Gathering sets, includes five new keyword abilities printed on the cards, one for each of the five dual-color guilds featured in the set. Let’s take a moment and look at each of these abilities–you might find one you want to incorporate into a deck build of your own!

Ability Keyword	Associated Guild	Rules Text	More Info
Detain	Azorius Senate	701.26a Certain spells and abilities can detain a permanent. Until the next turn of the controller of that spell or ability, that permanent can’t attack or block and its activated abilities can’t be activated.	Detain @ MTGSalvation Wiki
Scavenge	Golgari Swarm	702.95a Scavenge is an activated ability that functions only while the card with scavenge is in a graveyard. “Scavenge [cost]” means “[Cost], Exile this card from your graveyard: Put a number of +1/+1 counter equal to the power of the card you exiled on target creature. Activate this ability only any time you could cast a sorcery.”	Scavenge @ MTGSalvation Wiki
Overload	Izzet League	702.94a Overload is a keyword that represents two static abilities: one that functions from any zone in which the spell with overload can be cast and another that functions while the card is on the stack. Overload [cost] means “You may choose to pay [cost] rather than pay this spell’s mana cost” and “If you chose to pay this spell’s overload cost, change its text by replacing all instances of the word ‘target’ with the word ‘each.'” Using the overload ability follows the rules for paying alternative costs in rules 601.2b and 601.2e–g. 702.94b If a player chooses to pay the overload cost of a spell, that spell won’t require any targets. It may affect objects that couldn’t be chosen as legal targets if the spell were cast without its overload cost being paid. 702.94c Overload’s second ability creates a text-changing effect. See rule 612, “Text-Changing Effects.”	Overload @ MTGSalvation Wiki
Unleash	Cult of Rakdos	702.96a Unleash is a keyword that represents two static abilities. “Unleash” means “You may have this permanent enter the battlefield with an additional +1/+1 counter on it” and “This permanent can’t block as long as it has a +1/+1 counter on it.”	Unleash @ MTGSalvation Wiki
Populate	Selesnya Conclave	701.27a To populate means to choose a creature token you control and put a token onto the battlefield that’s a copy of that creature token. 701.27b If you control no creature tokens when instructed to populate, you won’t put a token onto the battlefield.	Populate @ MTGSalvation Wiki

Which Keywords Are Right for You?

• If you like to play control, Detain was tailor-made for you. Period. 😀
• If you like to swing with big creatures, both Unleash and Scavenge are great mechanics for pumping up creatures’ power and toughness, albeit through very different means.
• If you like to amass lots of little creatures very quickly, Populate will serve you well–just make sure you have one token to start off, and then let the Populating mechanic go wild!
• If you like to play combos, or if you like big splashy game effects, Overload in all its various forms will give you great options for both early-game and late-game.