1. Tinybones dealt combat damage to me
2. He picked dramatic accusation from my graveyard.
3. He cast the enchantment.
4. He then used it's activated ability.

While tinybones ability applies to casting cost to play a spell using any mana. Activated abilities are not part of the effect, and the player did not have 2 islands.

• the spell is an enchantment that both stuns and taps enchanted creature. With an activated ability that required 2 islands to actiavte and shuffle the creature back into the owners deck.