mtg precon 60 card decks Magic: the Gathering 60-Card Theme Deck sided token cards Preconstructed Decks for New Magic

Activate only if Surge Engine is blue and only once

For example, you can't cast a creature card with mayhem you couldn't normally cast during an opponent's turn, even if you discard that card during an opponent's turn

Then you can swap four life for a card

When Wurmcoil Engine returns to the battlefield, repeat the process infinitely: sacrifice Wurmcoil, stack the triggers, sacrifice a Wurm to pay the four for Nim Deathmantle, bring back the Wurmcoil Engine

The card certainly has a place in cube but as a way of generating value or card selection it is super hard to pull off

Dont be too precious with your Tuvasa early