Trinisphere Aetherdrift if the amount of mana

if the amount of mana spent to cast it was less than its mana value

create a 2/1 white Cat Warrior creature token

It's a Phyrexian in addition to its other types

−2: Target player sacrifices a creature

then you may cast any number of spells from among those cards without paying their mana costs

Trinisphere Aetherdrift if the amount of manaAs long as this artifact is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)