Goblin Spellsnatcher

When Goblin Spellsnatcher enters the battlefield, memorize instant or sorcery once.(The next time any player casts an instant or sorcery this turn, if its mana cost is less than what you payed to cast Goblin Spellsnatcher, create a copy of that spell. That spell loses memorize.)
When Goblin Spellsnatcher copies an instant or sorcery using its memorize ability, you may toss a coin. If the result is heads, copy that spell again.
If the result is tails, Goblin Spellsnatcher deals 2 damage to itself