Sheoldred, Whispering One (Phyrexian) [Secret Lair Drop Series] OP06-034 if an attack action card

if an attack action card was pitched to play it

"Keep a green tree in your heart and perhaps the singing bird will come

then taps the rest

When Experimental Aviator enters the battlefield

{R}: Petradon gets +1/+0 until end of turn

Sheoldred, Whispering One (Phyrexian) [Secret Lair Drop Series] OP06-034 if an attack action cardSet: Secret Lair Drop Series Type: Legendary Creature Phyrexian Praetor Rarity: Mythic Cost: {5}{B}{B} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield. At the beginning of each opponent's upkeep, that player sacrifices a creature.