msem-instigator

Enchant creature
Enchanted creature gets +2/+2 and has trample.

Trample
When Endangered Rhino dies, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Artifact creatures you control have haste.
At the beginning of your upkeep, create a 1/1 colorless Construct artifact creature token. If you control six or more artifacts, create a 6/6 colorless Golem artifact creature token instead. Tokens created this way attack this turn if able.

Whenever a land you control enters, choose one. If it doesn't share a name with another land you control, instead choose both—
• Create a 1/1 Scout creature token that's all colors.
• Put a +1/+1 counter on a creature you control.

Colossal 4—{4}{G}{G}{G} (You may cast this for its colossal cost to have it enter with four +1/+1 counters; or pay {4}{G}{G}{G} as a sorcery: Put four +1/+1 counters on it if it has none.)
Whenever a nontoken creature you control with a counter on it dies, create a 4/4 green Hydra creature token.

Whenever a player casts a spell, exile the top card of that player's library. You may play that card for as long as it remains exiled, and you may spend mana as though it was mana of any type to cast it.
At the beginning of your end step, put all cards exiled with Endless Inspiration into their owner's graveyards.

When Endless Trove enters, if it's not a token, each opponent may create a token that's a copy of it.
{T}: Add one mana of any color.

Menace
Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)

When Endmire Scourer dies, search your library for a card with mana value 4 or less, reveal it, put it into your hand, then shuffle.

When Endrison Familiar enters, reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.

Menace
Whenever you cast a noncreature spell, Enduring Charge gets +1/+1 until end of turn.

As an additional cost to cast this spell, reveal a sorcery card from your hand or pay {2}.
Return target card from your graveyard to your hand.

{T}: Add {C}.
{3}, {T}, Sacrifice Enduring Vestige: Search your library for a land card with a basic land type, put it onto the battlefield tapped, then shuffle.

Gain control of target creature with mana value 4 or less until end of turn. Untap that creature. It gains haste until end of turn.

Energize deals 3 damage to any target.
Catalyze. (The next spell you cast this turn costs {1} less to cast.)

Destroy target artifact or enchantment. Purge. (Exile two cards that share a type from graveyards. If you do, draw a card.)

Engulf in Flames deals 1 damage to target player and each of up to three target creatures that player controls. Those creatures can't block this turn.

When Enigma Mystic enters, mill three cards.
Enigma Mystic gets +2/+0 as long as there's a Shaman card in your graveyard.
{T}: Add one mana of any color. Activate only if you control another Shaman.

As Enlightened Sigil enters, choose a card type.
Spells you cast of the chosen type cost {1} less to cast.

Whenever a land you control enters, add one mana of any color.
Whenever Enraged Fangwurm attacks, you may sacrifice a land. If you do, Enraged Fangwurm deals 2 damage to target player or planeswalker.

Trample
Whenever a creature you control with trample is dealt damage, put a +1/+1 counter on it. (It must survive the damage to get the counter.)

Prowess

Enshrouded Village enters tapped.
{T}: Add {G}.
{1}{G}{G}: Until end of turn, Enshrouded Village becomes a 4/4 Human creature with trample. Activate only if you're horrific.

Enchant creature
Enchanted creature has reach. (It can block creatures with flying)
{G}, Sacrifice Ensnaring Vines: Tap target creature with flying.

Landfall — Whenever a land you control enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)