Infinite LTB, Infinite ETB, Infinite death triggers
Cast Mercurial Pretender by paying its mana cost, choosing to have it enter the battlefield as a copy of Bladewing.
Put Bladewing into your graveyard due to the legend rule.
Mercurial Pretender's enter-the-battlefield ability triggers, returning Bladewing from your graveyard to the battlefield.
Put Bladewing into your graveyard due to the legend rule.
Bladewing's enter-the-battlefield ability triggers, returning it from your graveyard to the battlefield.
Repeat from step 4.
Component Cards
How It Works
Cast Mercurial Pretender by paying its mana cost, choosing to have it enter the battlefield as a copy of Bladewing.
Put Bladewing into your graveyard due to the legend rule.
Mercurial Pretender's enter-the-battlefield ability triggers, returning Bladewing from your graveyard to the battlefield.
Put Bladewing into your graveyard due to the legend rule.
Bladewing's enter-the-battlefield ability triggers, returning it from your graveyard to the battlefield.
Repeat from step 4.