This red burn enchantment benefits from go wide strategies, and has multiple printings on creatures such as : Molten Gatekeeper, Witty Roastmaster, Agate Instigator etc etc.
IMPACT TREMORS BABYYYYY
This White 4/4 creature doubles any tokens that you would create. You can pay 3 mana, and sac 2 artifacts or creatures to give it an indestructible counter
Mondrak, Glory Dominus 
This is MTG's Most popular multiplayer format
Commander (I barely know her)
When a player plays a Turn 1 "___ ___" they're likely to draw some groans from the table.
Sol Ring

A creature with this keyword cannot attack. (But they definetely can block)
Defender 
This Artifact causes a player to mill a card, whenever a permanent is untapped
Mesmeric Orb
This 5 mana Green enchantment doubles tokens, and +1/+1 counters for the whole table!
Primal Vigor 
This 60 card format is limited to commons
Pauper (I barely know her)
These two one mana white creature removal spell are often an auto include in any deck that plays white.
Swords to Plowshares / Path to Exile 

A creature with this keyword asks : "But what about second damage?"
Double Strike 
This black sorcery allows you to re-animate two creatures from your graveyard at the cost of sacrificing one of your current creatures.
Victimize
This Final Fantasy Legendary Artifact doubles all life that you would gain
The Wind Crystal 
This 60 card format is limited to the 20 most recently released sets.
This equipment bypasses summoning sickness when attached to a creature. It also provides some protection Be careful! You can't target the creature either!
Lightning Greaves 
A card with this keyword has a triggered ability when an opponent targets it to pay an additional cost when targeted, otherwise the spell cast fizzles.
Ward 
This blue enchantment promotes "grouphug" strategies by flooding your opponents hands with cards
Forced Fruition
This 4 mana green enchantment doubles all tokens that would enter under your control
Parallel Lives
This fan made unofficial format was released as a secret lair. It features two players sharing the same deck.
Dandân
Which counterspell is most played in EDH?
Counterspell 
If a card with _____ is in your graveyard, instead of drawing a card, you may put the top X cards of your library into your graveyard where X number associated with the ability, and return the ____ card to your hand.
Dredge 
This Vehicle allows you to put out lands to the battlefield when they're milled from your library
Hedge Shredder
Released in Edge of Eternities, this 4 mana enchantment can be warped for (G). It will double all counters put on creatures/spacecrafts/planets you control
Loading Zone 
This format allows the use of cards from all of MTG's history.
Vintage
Name at least three green sorceries that ramp a land for 2 or 3 mana
Three visits / Nature's Lore / Rampant Growth / Farseek / Cultivate / Kodama's Reach / Many more.
If a creature with ____ is blocked or blocks, it gets +X/+X until the end of the turn, where X is the number associated with ______
Bushido 