Aventador, Time Mage

Haste, lifelink
Whenever you cast your second dinosaur spell each turn, you may pay {x}, where {x} is the second spell's converted mana cost. If you do, take an extra turn after this one.
Aventador, Time Mage must attack each turn if able.
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Spanning spacetime Aventador learned of the beings of old and used them to his advantage.