Experiment Five [Mystery Booster Playtest Cards] Condition:Near Mint Set: Darksteel Type: Creature —

Set: Darksteel Type: Creature — Wurm Rarity: Rare Cost: {5}{G}{G} Whenever Roaring Slagwurm attacks

In that case you'll get a nice view before it knocks the tree down and eats you

how would I know it worked

Exile Moorland Rescuer

Set: Outlaws of Thunder Junction: Breaking News Type: Sorcery Rarity: Uncommon Cost: {2}{R} Spectacle {R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn

Experiment Five [Mystery Booster Playtest Cards] Condition:Near Mint Set: Darksteel Type: Creature —Set: Mystery Booster Playtest Cards Type: Creature Bear Snake Mutant Rarity: Rare Cost: {G} {1}{Z}: Put a +1 +2 counter on Experiment Five. ({Z} is paid with one mana from any source that could produce two or more colors of mana.) TEST CARD Not for constructed play