All creatures able to block Taunting Elf do so.

When Telepathic Spies enters the battlefield, look at target opponent's hand.

, : Return target permanent to its owner's hand.

Flying
When you control no enchantments, sacrifice Tethered Griffin.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Thieving Magpie deals damage to an opponent, draw a card.

You may have Thorn Elemental assign its combat damage as though it weren't blocked.

: Add .

, , Exile Thran Foundry: Target player shuffles their graveyard into their library.

As long as Thran Golem is enchanted, it gets +2/+2 and has flying, first strike, and trample.

Flying

Enchant creature
When Treachery enters the battlefield, untap up to five lands.
You control enchanted creature.

Attacking creatures get +2/+0 until end of turn.

Enchant creature
Enchanted creature gets +3/-1.

As Urza's Incubator enters the battlefield, choose a creature type.
Creature spells of the chosen type cost less to cast.

Flying, protection from green

Flying, protection from blue

Destroy target land and all other lands with the same name as that land.

Defender (This creature can't attack.)
Wall of Glare can block any number of creatures.

Haste

When Yavimaya Elder dies, you may search your library for up to two basic land cards, reveal them, put them into your hand, then shuffle your library.
, Sacrifice Yavimaya Elder: Draw a card.