basic latios pokemon card Latias & GX #170 EXTENDED ART – Raycardza Colorless Luster Purge (210) Discard 2 Energy from this Pokémon Latios - Pokémon TCG Pocket

This provides infinite mana and infinite channeling of Boseiju, Who Endures and Otawara, Soaring City

Cant really get around Haste with Extra, though

Keep that in mind in case someone casts Black Suns Zenith for 2 while you control Mayor of Avabruck and 2 other 2/2 humans (who are 3/3 while the Mayor is around)

If you wait with this card dead in your hand or you just dont draw it until later in the game, there are other things you can spend your mana on at that point

Booster Box (Magic Double Masters | Magic Cards) prices are based on the historic sales

If you need a board wipe, Nuclear Fallout should have you covered