Combos Utilizing Invisibility

Enchant Reef Pirates with Invisibility to make it unblockable. When Reef Pirates attacks and isn't blocked, top card in opponent's library goes to his/her graveyard.

Enchant Soltari Visionary with Invisibility to make it unblockable. When Soltari Visionary damages your opponent, destroy opponent's enchantment

use this in a blue/black deck, quick silver to get out bfm for four mana then invisibility to make it unblockable and counters from the blue part of the deck to make sure the 99/99 damage goes through

Enchant Goblin Vandal with Invisibility making it unblockable. When Goblin Vandal attacks and isn't blocked, destroy opponent's artifact.

Enchant Shocker with Invisibility to make it unblockable. When it attacks and isn't blocked, put your opponent discards his hand and draws another one.

Enchant Thieving Magpie with Invisibility to make it unblockable. When Thieving Magpie damages your opponent, draw a card.

Enchant Bone Dancer with Invisibility to make it unblockable. When Bone Dancer attacks, top creature in opponen'ts graveyard is put in play under your control.

Enchant Floral Spuzzem with Invisibility to make it unblockable. When Floral Spuzzem attacks and isn't blocked, destroy opponen'ts artifact

Enchant Ophidian with Invisibility to make it unblockable. When Ophidian attacks and isn't blocked, you can draw a card instead of having Ophidian deal damage.

Enchant Blinding Angel with Invisibility to make it unblockable. When Blinding Angel attacks and isn't blocked, your opponent must skip his/her next combat phase.