Altraz, Spirit Alchemist

Whenever you cast an instant or sorcery, exile
a card in your graveyard of the same or lesser
mana cost. Create a X/X blue and green Viashino Spirit where X is the converted mana cost the
spell exiled.
Landfall - Spells you cast with X in their mana
cost {1} less to play for each land that entered the battlefield this turn.
I hear the voice of my ancestor, I only answer their
call for retribution