msem-instigator

Whenever Hero of Aer attacks, it gets +2/+1 until end of turn.

Flying
Illuminated Firebird can't block.
Foresight — Whenever you draw your second card each turn, return Illuminated Firebird from your graveyard to the battlefield.

This spell can't be countered.
Inescapable Blaze deals 6 damage to any target.

Whenever Lone Freelancer becomes blocked, it deals damage equal to its power to defending player.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Masked Lancer has first strike as long as it's attacking.
Whenever Masked Lancer mentors a creature, that creature gains first strike until end of turn.

Equipped creature gets +2/+0 and has haste.
Equip {2}

As Nimble Sandstorm enters, choose speed or power.
At the beginning of combat on your turn,
• Speed — Target creature gains haste until end of turn.
• Power — Target creature gets +2/+0 until end of turn.

Destroy target artifact. Scry 1.

As Protect the Treasure enters, choose offense or defense.
Whenever an artifact you control enters for the first time each turn,
• Offense — Protect the Treasure deals 2 damage to each opponent.
• Defense — Add {R}{R}.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
{2}{R}, Sacrifice Prowling Beastmaster: It deals 2 damage to target player or planeswalker.

Haste
Whenever Reckless Dunerider attacks, if it's enchanted or equipped, you may draw a card. If you do, discard a card.

Discard any number of cards, then sacrifice any number of artifacts. Draw X cards, where X is one plus the number of cards discarded and artifacts sacrificed this way.

Choose one —
• Target creature gets +4/+0 until end of turn.
• Sandstorm Charm deals 1 damage to target creature. It can't block this turn.
• Scry 1, then draw a card.

Menace
Whenever Searing Sandwurm is dealt damage, it deals that much damage to target player or planeswalker.

Sparkmage Prodigy has first strike as long as it's your turn.
Whenever you cast a cryptic spell, Sparkmage Prodigy deals 1 damage to each opponent. (Artifacts, enchantments, and modal spells are cryptic.)

Flash
When Splitting Image enters, you may pay {2} any number of times. Whenever you do, copy target spell. You may reselect modes and choose new targets for the copies.

Vigilance, reach
Whenever Cave Spider blocks a creature with flying, Cave Spider gets +2/+0 until end of turn.

Trample
{1}{G}, Exile a card from your graveyard: Target creature gains trample until end of turn.

Trample
Colossal Greatwurm enters with five +1/+1 counters on it.
Whenever a player draws a card, put a +1/+1 counter on Colossal Greatwurm.
Remove three +1/+1 counters from Colossal Greatwurm: Create a 3/3 green Wurm creature token.

Flash
Enchant creature
Enchanted creature gets +2/+2 and can't be blocked by creatures with power 2 or less.

Put a +1/+1 counter on target creature you control if it's enchanted or equipped. It deals damage equal to its power to up to one other target creature.

Vigilance, ward {2}
{1}{G}, {T}: Put a +1/+1 counter on Dunetreader Tortoise. Activate only as a sorcery.

Reveal the top six cards of your library. Put all noncreature cards revealed this way into your graveyard, put the rest back on top in any order, then draw cards equal to the number of cards put on top.

Foresight — Whenever you draw your second card each turn, Haggler's Hound gets +1/+1 and can't be blocked by creatures with power 2 or less until end of turn.

Whenever Herald of Earth deals combat damage to a player, draw a card.
Whenever you draw a card, put a +1/+1 counter on Herald of Earth.