msem-instigator

Flash
Thorn-Touch Abomination enters with X +1/+1 counters on it.

At the beginning of your upkeep, mill two cards.
{1}{G}, Sacrifice Strange Discovery: Return target card from your graveyard to your hand.

Trample
Seasoned Adventurer enters with two +1/+1 counters if you control seven or more lands.

Reach
When Scavenging Pack enters, you may destroy target artifact with mana value 2 or less.

Destroy target artifact or enchantment. If you controlled that artifact or enchantment, draw two cards.

When Rethia Cultivator enters, you may search your library for a land card, reveal it, put it into your hand, then shuffle.

Trample
When Pernicious Primavore enters or dies, destroy up to three target artifacts and/or enchantments.

Whenever a creature dies, put a +1/+1 counter on each creature you control with power less than it.
{3}{G}, Sacrifice a creature: Draw cards equal to the sacrificed creature's power.

Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)
Creatures with power less than Olten Survivalist's power can't block creatures you control.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Add one mana of any color.

Reach
Lupine Skygrazer enters with a +1/+1 counter on it if three or more colors of mana were spent to cast it.

Trample
Augmented — When Lonely Giant enters, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put two +1/+1 counters on it.

Return any number of lands you control to their owner's hands. For each land returned this way, search your library for a land card, reveal it, then put it into your hand. Then shuffle.

Trample
Augmented — Whenever you cast a spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Isolated Guardian. It loses this ability and gains “Whenever this attacks, put two +1/+1 counters on each of up to two target creatures.”

Target creature +3/+3 and gains trample until end of turn.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

When Green Daywalker enters, you may destroy target artifact or enchantment.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Green Daywalker.

When Greedy Insects enters, exile up to one target artifact or enchantment until Greedy Insects leaves the battlefield.

Trample
Noncreature spells cost an additional “Put a noncreature permanent you both own and control on top of your library” to cast.

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Converge — Dirty-Pawed Grazer enters with a +1/+1 counter on it for each color of mana spent to cast it.
Dirty-Pawed Grazer can't be blocked by creatures with power 2 or less.

Flash
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

Haste
When Dedicated Bushwacker enters, other creatures you control get +1/+0 and gain haste until end of turn.

Trample
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Deathtouch
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)