Dream Fighter is a common Creature — Human Soldier card from Mirage (MIR), collector number 63. Current market price: $0.06, TCGplayer market prices via Scryfall.
Whenever this creature blocks or becomes blocked by a creature, this creature and that creature phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)