msem-instigator

Whenever Marine Delver attacks, draw a card.

When Marionette Phantom enters, choose one —
• Draw a card.
• Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Flying

Flying
Whenever you tap a land for mana, add one mana of any type that land produced.
At the beginning of each end step, if you control no untapped lands, transform Martoob, Blessing of Water.

Indestructible
Marva of Endless Inspiration can't attack or block unless you've cast a spell with mana value 4 or greater this turn.
At the beginning of your end step, return a card at random from your graveyard to your hand. If it's a land card, return it to the battlefield instead.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Master of Winds or another creature with flying you control enters, you may draw a card.

First strike
Mauling Mother gets +1/+1 for each other creature you control.

Flying
Whenever you cast a spell, draw a card, then put a +1/+1 counter on Maven of Perspective.

When you cast this spell from anywhere other than your hand, it deals 5 damage to any target.
Trample

Colossal 4—{5}{U}{U}{U} (You may cast this for its colossal cost to have it enter with four +1/+1 counters; or pay {5}{U}{U}{U} as a sorcery: Put four +1/+1 counters on it if it has none.)
Whenever Megalokraken enters or attacks, reveal the top X cards of your library, where X is Megalokraken's power. You may cast a noncreature spell with mana value X or less from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

Crew 3 (Tap any number of creatures you control with total power 3 or greater: This Vehicle becomes an artifact creature until end of turn.)

This spell costs {1} less to cast if you control a Warrior.

Flash
Reach
When Mina and Adurnos enter, prevent all combat damage other creatures would deal this turn.
When Mina and Adurnos dies or this spell is countered, draw two cards.

When Mindbreak Artisan enters, you may search your library for an artifact card, reveal it, shuffle, then put that card on top.
Other artifacts you control have “You may choose not to untap this artifact during your untap step” and “{3}{U}{U}, {T}: Gain control of target creature for as long as you control this artifact and it remains tapped.”

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.

Flying, ward {2}
At the beginning of your upkeep, if Mirrorwing Commander is embattled, create a token that's a copy of it. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

At the beginning of your upkeep, you may choose one —
• Put a card from your hand on the bottom of your library. If you do, draw a card.
• Discard a card. If you do, put the bottom card of your library into your hand.

Other creatures you control get +2/+2.

Vigilance
{7}{G}: Molting Linnorm gets +5/+5 and gains trample until end of turn.

Moonlight Stag has vigilance as long as it has a +1/+1 counter on it.

At the beginning of your end step, for each permanent with exactly one counter on it, you may choose one —
• Remove all counters from that permanent.
• Choose a kind of counter on that permanent. Put another counter of that kind on that permanent.

Vigilance, reach, trample

When Mourners of Mervin enters, you may sacrifice a creature or enchantment. If you do, creatures you control get +1/+1 and gain vigilance until end of turn.

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
At the beginning of each end step, scry X, you gain X life, and Nakia, Infinity Seer deals X damage to up to one target creature or planeswalker, where X is the number of noncreature spells you've cast this turn.