Ydwen Efreet [Arabian Nights] Fifth Edition creatures can't attack you or

creatures can't attack you or a planeswalker you control unless their controller pays {1} for each of those creatures

Set: Legends Type: Sorcery Rare Cost: {2}{G}{G} Starting with you

Set: Modern Masters Type: Sorcery Rare Cost: {1}{G} Return up to three target land cards from your graveyard to your hand

Set: Limited Edition Beta Type: Enchantment Rare Cost: {1}{B} Black creatures get +1/+1

but for reasons known only to the two of them neither acknowledges the other—or their strained relationship

Ydwen Efreet [Arabian Nights] Fifth Edition creatures can't attack you orSet: Arabian Nights Type: Creature Efreet Rare Cost: {R}{R}{R} Whenever Ydwen Efreet blocks, flip a coin. If you lose the flip, remove Ydwen Efreet from combat and it can't block this turn. Creatures it was blocking that had become blocked by only Ydwen Efreet this combat become unblocked.