Thought Rattle

Starting intensity 0 Whenever another creature you control with flying enters, if this creature is named Awestruck Cygnet, cards you own named Awestruck Cygnet intensify by 1. As long as this card's intensity is 3 or more, it has base power and toughness 4/4, has flying and vigilance, and is named Radiant Swan.

When Cottontail Caretaker enters, choose a white creature card in your hand. That card perpetually gains offspring 1.

When Sandcloud Harbinger enters, conjure three cards named Sunscorched Desert into the top ten cards of each player's library at random. Whenever a player plays a Desert, that player draws a card and you gain 3 life.

Look at the top six cards of your library. You may put a creature card with mana value 3 or less from among them onto the battlefield, then conjure a duplicate of that card onto the battlefield. The duplicate perpetually has base power and toughness 1/1. Put the rest on the bottom of your library in a random order.

Gift a Rhystic Study Shuffle your hand and graveyard into your library, then draw seven cards. If the gift wasn't promised, each other player also shuffles their hand and graveyard into their library, then draws seven cards.

Gift a tapped Fish Draw two cards. If the gift was promised, seek two nonland cards instead.

Whenever Shellfish Scholar or another Rat you control enters, conjure a card named Think Twice into your graveyard. Threshold — T: Spells you cast from your graveyard this turn cost 2 less to cast. Activate only if seven or more cards are in your graveyard.

T: Add two mana in any combination of colors. Spend this mana only to cast instant or sorcery spells. Whenever you cast your third spell each turn, exile a random card from your library. Until end of turn, you may play that card without paying its mana cost.