Trample
When this creature enters, you may search your library for up to three cards named Nesting Wurm, reveal them, put them into your hand, then shuffle.

Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.)
Whenever this creature attacks, you may have it deal 1 damage to each creature defending player controls.

Flash
Flying
Artifacts and creatures entering don't cause abilities to trigger.

Trample
When Iwamori enters, each opponent may put a legendary creature card from their hand onto the battlefield.

Flying, lifelink
Spells you cast have delve. (Each card you exile from your graveyard while casting those spells pays for .)
Whenever you cast a spell, you lose life equal to its mana value.

Draw a card.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying
Sacrifice this creature: Creatures you control gain indestructible until end of turn.

(: Add or .)
This land enters tapped unless you control two or more basic lands.

First strike
Whenever you cast your third spell each turn, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Creatures you control have double strike.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever this creature deals combat damage to a player, you may draw a card.

: Add .
: Add or . This land deals 1 damage to you.

: You gain 1 life.

Destroy target artifact or enchantment.
Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

(: Add .)

Search your library for a land card, reveal it, put it into your hand, then shuffle.

: Add .
: Add or . This land deals 1 damage to you.

: Add for each Elf on the battlefield.

Exile all creatures. Empower Jace X, where X is the number of creatures exiled this way. (Put that many loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card.")

+1: Create a 1/1 colorless Servo artifact creature token.
+1: The next spell you cast this turn has affinity for artifacts. (It costs less to cast for each artifact you control as you cast it.)
−7: For each artifact you control, create a token that's a copy of it. Those tokens gain haste. Exile those tokens at the beginning of the next end step.
Saheeli, the Gifted can be your commander.