Aven Fisher

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature dies, you may draw a card.

Aven Windreader

Flying (This creature can't be blocked except by creatures with flying or reach.)
{1}{U}: Target player reveals the top card of their library.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When this creature enters, destroy target enchantment.

Return target permanent to its owner's hand.

Whenever this creature deals combat damage to a player, return up to that many target permanents that player controls to their owner's hand.

You may have this creature enter as a copy of any creature on the battlefield.

Flying
This creature can block only creatures with flying.

Flying (This creature can't be blocked except by creatures with flying or reach.)
This creature can block only creatures with flying.

{T}: Target creature with power 2 or less can't be blocked this turn.