Cast Saw in Half by paying its mana cost targeting the creature that can recur spells.
When you cast that spell, Spinerock Tyrant triggers, copying Saw in Half and choosing Spinerock Tyrant as its target.
Resolve the copy of Saw in Half, creating two Spinerock Tyrant tokens, except their power and toughness are halved to a minimum of 1.
Resolve the original Saw in Half, creating two token copies of the spell recursion creature, except their power and toughness are halved to a minimum of 1.
When those tokens enter, they trigger, returning Saw in Half and another target card of the appropriate type from your graveyard to your hand.
Cast Saw in Half by paying its mana cost targeting the creature that can recur spells.
When you cast that spell, each copy of Spinerock Tyrant triggers, copying Saw in Half once for each Spinerock Tyrant and choosing a different copy of Spinerock Tyrant as each additional spell's target
Resolve the copies of Saw in Half, creating four Spinerock Tyrant tokens, except their power and toughness are halved to a minimum of 1.
Resolve the original Saw in Half, creating two token copies of the spell recursion creature, except their power and toughness are halved to a minimum of 1.
When those tokens enter, they trigger, returning Saw in Half and another target card of the appropriate type from your graveyard to your hand.
Cast the spell that creates a Treasure token by paying its mana cost, targeting any creature.
Each copy of Spinerock Tyrant triggers, copying that spell once for each Spinerock Tyrant you control.
Resolve all copies of that spell, creating at least one Treasure token each time.
Activate those Treasure tokens by tapping and sacrificing them, adding one mana per Treasure.
Cast Saw in Half by paying its mana cost targeting the spell recursion creature.
When you cast that spell, each copy of Spinerock Tyrant triggers, copying Saw in Half once for each Spinerock Tyrant and choosing a different copy of Spinerock Tyrant as each additional spell's target.
Resolve all copies of that spell, creating two copies of the spell recursion creature and additional copies of Spinerock Tyrant.
When the first spell recursion creature token enters, it triggers, returning the spell that creates Treasure from your graveyard to your hand.
When the second spell recursion creature token enters, it triggers, returning Saw in Half from your graveyard to your hand.