Keyword: Transform

At the beginning of your upkeep, look at the top card of your library. You may put it into your graveyard. Then if you have seven or more cards in your graveyard, you may transform Search for Azcanta.

When Growing Rites of Itlimoc enters the battlefield, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
At the beginning of your end step, if you control four or more creatures, transform Growing Rites of Itlimoc.

, : Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library.
At the beginning of your end step, if you control seven or more lands, transform Thaumatic Compass.

At the beginning of your upkeep, look at the top card of your library. You may put it into your graveyard. Then if you have seven or more cards in your graveyard, you may transform Search for Azcanta.

When Dowsing Dagger enters the battlefield, target opponent creates two 0/2 green Plant creature tokens with defender.
Equipped creature gets +2/+1.
Whenever equipped creature deals combat damage to a player, you may transform Dowsing Dagger.
Equip

When Growing Rites of Itlimoc enters the battlefield, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
At the beginning of your end step, if you control four or more creatures, transform Growing Rites of Itlimoc.

At the beginning of your upkeep, exile the top card of your library. If it’s a nonland card, you may cast that card this turn.
Whenever you cast your third spell in a turn, you may transform Vance’s Blasting Cannons.

, Pay 2 life: Draw a card.
At the beginning of your upkeep, if you have 5 or less life, you may transform Arguel’s Blood Fast.

Instant and sorcery spells you cast cost less to cast.
Whenever you cast an instant or sorcery spell, put a charge counter on Primal Amulet. Then if there are four or more charge counters on it, you may remove those counters and transform it.

, Discard a card: Transform Elusive Tormentor.

Transform up to one target Werewolf you control. Creatures you control gain trample until end of turn.

Flying
Whenever you cast an instant or sorcery spell, create a 1/1 blue Human Wizard creature token. Then if you control three or more Wizards, transform Docent of Perfection.

Flying
Sacrifice three other creatures: Transform Voldaren Pariah.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Whenever this creature enters the battlefield or transforms into Ulrich of the Krallenhorde, target creature gets +4/+4 until end of turn.
At the beginning of each upkeep, if no spells were cast last turn, transform Ulrich of the Krallenhorde.

Whenever this creature enters the battlefield or transforms into Ulrich of the Krallenhorde, target creature gets +4/+4 until end of turn.
At the beginning of each upkeep, if no spells were cast last turn, transform Ulrich of the Krallenhorde.

Flying
Sacrifice three other creatures: Transform Voldaren Pariah.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Haste
At the beginning of each upkeep, if no spells were cast last turn, transform Geier Reach Bandit.

Flash
Flying, vigilance
When Archangel Avacyn enters the battlefield, creatures you control gain indestructible until end of turn.
When a non-Angel creature you control dies, transform Archangel Avacyn at the beginning of the next upkeep.