For those unfamiliar with Pioneer, it's a constructed format that includes cards from Return to Ravnica forward
(2017-04-18) You are a permanent's owner if the card representing it began the game in your deck, or if it's a token that entered the battlefield under your control
(A creature with hexproof can't be the target of spells or abilities your opponents control.) A land that becomes a creature because of Avalanche Caller's activated ability will retain any other supertypes, card types, subtypes, and abilities it had
One curious aspect of this card is that it has a much faster infinite combo with Chain of Acid, which lets you copy infinite spells and win via the magecraft mechanic, but that can be done with any indestructible artifact
Take to the skies, strike with everything you've got, and crush your opponents on the way to victory in Magic: The Gathering Marvel Super Heroes
Unlike most hate cards, Scavenging Ooze can grow large enough to take over a game even when your opponent isn't playing out of their 'yard