mtg.wtf

When Mephitic Draught enters the battlefield or is put into a graveyard from the battlefield, you draw a card and you lose 1 life.

When Mercenary Knight enters the battlefield, sacrifice it unless you discard a creature card.

When Merchant of Secrets enters the battlefield, draw a card.

When Merciless Executioner enters the battlefield, each player sacrifices a creature.

When Merfolk Branchwalker enters the battlefield, it explores.

When Merfolk Observer enters the battlefield, look at the top card of target player's library.

When Merfolk Pupil enters the battlefield, draw a card, then discard a card.
{1}{U}, Exile Merfolk Pupil from your graveyard: Draw a card, then discard a card.

Flying
When Merfolk Skydiver enters the battlefield, put a +1/+1 counter on target creature you control.
{3}{G}{U}: Proliferate.

When Merfolk Traders enters the battlefield, draw a card, then discard a card.

Flash
When Merfolk Trickster enters the battlefield, tap target creature an opponent controls. It loses all abilities until end of turn.

When Merfolk Tunnel-Guide enters the battlefield, you get a three-time boon with "Whenever one or more Merfolk enter the battlefield under your control, target Merfolk creature you control explores."

Flying
When Merfolk Wayfinder enters the battlefield, reveal the top three cards of your library. Put all Island cards revealed this way into your hand and the rest on the bottom of your library in any order.

Reach
Domain — When Meria's Outrider enters the battlefield, it deals damage to each opponent equal to the number of basic land types among lands you control.

Islandwalk
When Merrow Harbinger enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.

When Merrow Witsniper enters the battlefield, target player mills a card.

When Merry Bards enters the battlefield, you may pay {1}. When you do, create a Young Hero Role token attached to target creature you control.

Flying
When Mesa Cavalier enters the battlefield, you gain 2 life.

When Mesmeric Fiend enters the battlefield, target opponent reveals their hand and you choose a nonland card from it. Exile that card.
When Mesmeric Fiend leaves the battlefield, return the exiled card to its owner's hand.

When Mesmerizing Benthid enters the battlefield, create two 0/2 blue Illusion creature tokens with "Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Mesmerizing Benthid has hexproof as long as you control an Illusion.

Enchant creature
When Mesmerizing Dose enters the battlefield, tap enchanted creature, then proliferate.
Enchanted creature doesn't untap during its controller's untap step.

Flying
When Messenger Falcons enters the battlefield, draw a card.

Flying
Council's dilemma — When Messenger Jays enters the battlefield, starting with you, each player votes for feather or quill. Put a +1/+1 counter on Messenger Jays for each feather vote and draw a card for each quill vote. For each card drawn this way, discard a card.

When Metalspinner's Puzzleknot enters the battlefield, you draw a card and you lose 1 life.
{2}{B}, Sacrifice Metalspinner's Puzzleknot: You draw a card and you lose 1 life.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

When Meteorite enters the battlefield, it deals 2 damage to any target.
{T}: Add one mana of any color.