msem-instigator

Search your library for a creature or planeswalker card, reveal it, put it into your hand, then shuffle.

Create a 1/1 white Soldier creature token. It gets +1/+1 and gains first strike until end of turn.

As an additional cost to cast this spell, discard a card.
Draw three cards.

As Game Trail enters, you may reveal a Mountain or Forest card from your hand. If you don't, Game Trail enters tapped.
{T}: Add {R} or {G}.

First strike
Creatures with power greater than Gao'Wu, Master Soothsayer's power can't attack.

Whenever a creature attacks, if its toughness is greater than its power, untap it.

Defender (This creature can't attack.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Populate, then you gain 2 life. (Create a token that's a copy of a creature token you control.)

Prevent all combat damage target creature would deal this turn. You gain life equal to that creature's power.

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

Motivate 3 (When this creature enters, you may motivate target creature with less power than this by putting three +1/+1 counters on it.)
When General Merthilios motivates a creature, that creature gains first strike, trample, and haste until end of turn.

Whenever a creature 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.”)
{2}, Sacrifice an Idol: Creatures you control get +1/+1 until end of turn.

Enchant creature
Enchanted creature and other creatures you control that share a creature type with it get +1/+1 and have vigilance.

Choose two—
• Target creature gains indestructible until end of turn.
• You gain 3 life.
• Draw a card.

Ghastly Castle enters tapped unless another player controls a land that could produce {U} or {B}.
{T}: Add {U} or {B}.

Tribute 1 (As this creature enters, an opponent of your choice may put a +1/+1 counter on it.)
When Giant Dromad enters, if tribute wasn't paid, you may destroy target artifact or enchantment.

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Regenerate target creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it.)

Whenever you cast a spell during an opponent's turn, put a charge counter on Gift of the Sphinx.
At the beginning of your upkeep, draw a card for each charge counter on Gift of the Sphinx.

Gifted Arcanomancer gets +1/+1 as long as you control a Mountain.
{3}{R}: Exile the top card of your library. Until end of turn, you may play that card.

When Giku Weaponsmith enters, create two colorless Equipment artifact tokens with “Equipped creature gets +1/+1” and equip {1}.

Gild-Cloak Strider can't be blocked by creatures with greater power.
{1}{W/U}: Return Gild-Cloak Strider to its owner's hand.

Renown 2 (When this creature deals combat damage to a player, if it isn't renowned, put two +1/+1 counters on it and it becomes renowned.)
When Gilded Champion becomes renowned, you may search your library for an Equipment or Aura card, reveal it, put it into your hand, then shuffle.

Lifelink