Mindbender Spores is a rare Creature — Fungus Wall card from Mirage (MIR), collector number 229. Current market price: $1.42, TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) Flying Whenever this creature blocks a creature, put four fungus counters on that creature. The creature gains "This creature doesn't untap during your untap step if it has a fungus counter on it" and "At the beginning of your upkeep, remove a fungus counter from this creature."