
When this enchantment enters, create a 2/2 green Bird creature token with "Whenever a land you control enters, this token gets +1/+0 until end of turn."
At the beginning of your first main phase, if you control four or more Birds, transformtransformTo mill a card, put the top card of your library into your graveyard. this enchantment.
When this permanent transforms into Black Chocobo, search your library for a land card, put it onto the battlefield tapped, then shuffle.
LandfallLandfallAbility word: triggers whenever a land enters under your control. — Whenever a land you control enters, Birds you control get +1/+0 until end of turn.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.