Surtr, Fiery Jötun

Those Who Came Before — This spell costs 1 less to cast for each historic card in your graveyard. (Artifacts, legendaries, and Sagas are historic.) Exile any number of historic cards from your graveyard with total mana value 30 or greater: You get an emblem with "Creatures you control have base power and toughness 9/9."

Equipped creature has lifelink. As long as you have 30 or more life, equipped creature gets +5/+5 and has indestructible and "Prevent all damage that would be dealt to this creature." Equip WW

Freerunning 1W (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.) Create three 1/1 white Human Rogue creature tokens.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — You and target opponent each draw two cards. II — Exile target artifact an opponent controls. III — Each player chooses three nonland permanents they control. Destroy all other nonland permanents.

2, T: Target creature you control phases out. (Treat it and anything attached to it as though they don't exist until your next turn.)

When this Equipment enters, attach it to target creature you control. Equipped creature gets +1/+0. During your turn, equipped creature has flying. Equip 2 (2: Attach to target creature you control. Equip only as a sorcery.)

First strike When Layla Hassan enters and whenever one or more Assassins you control deal combat damage to a player, return target historic card from your graveyard to your hand.

Flying, vigilance T, Exile Senu: You gain 2 life and scry 2. When a legendary creature you control attacks and isn't blocked, if this card is exiled, put it onto the battlefield attacking.