Flying Whenever you investigate for the first time each turn, investigate an additional time.

Flying When Ethereal Investigator enters the battlefield, investigate X times, where X is the number of opponents you have. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Whenever you draw your second card each turn, create a 1/1 white Spirit creature token with flying.

Whenever you cast an artifact spell, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Activated abilities of artifacts you control cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Woman Who Walked the Earth — When Martha Jones enters the battlefield, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Whenever you sacrifice a Clue, Martha Jones and up to one other target creature can't be blocked this turn. Doctor's companion (You can have two commanders if the other is the Doctor.)

Flying Whenever a nontoken creature you control dies, investigate. Clues you control have exalted. (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn for each instance of exalted among permanents you control.)

When Novice Inspector enters the battlefield, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Other Detectives you control get +1/+1. Whenever you draw your second card each turn, target Detective can't be blocked this turn.

You may cast creature spells as though they had flash. Whenever one or more other creatures you control leave the battlefield, investigate. This ability triggers only once each turn. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Whenever a creature is exiled from the battlefield, put a +1/+1 counter on Soulherder. At the beginning of your end step, you may exile another target creature you control, then return that card to the battlefield under its owner's control.

When Thraben Inspector enters the battlefield, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Enchant creature Enchanted creature gets +1/+1 for each artifact and/or enchantment you control.

When Armed with Proof enters the battlefield, investigate twice. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Clues you control are Equipment in addition to their other types and have "Equipped creature gets +2/+0" and equip {2}.

Enchant creature Enchanted creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, investigate." (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

When Proft's Eidetic Memory enters the battlefield, draw a card. You have no maximum hand size. At the beginning of combat on your turn, if you've drawn more than one card this turn, put X +1/+1 counters on target creature you control, where X is the number of cards you've drawn this turn minus one.

Whenever you attack, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.") Whenever you sacrifice a Clue, venture into the dungeon. (Enter the first room or advance to the next room.)

{T}: Add one mana of any color in your commander's color identity.

Deserted Beach enters the battlefield tapped unless you control two or more other lands. {T}: Add {W} or {U}.

({T}: Add {U}.)

({T}: Add {W}.)

As Port Town enters the battlefield, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters the battlefield tapped. {T}: Add {W} or {U}.

({T}: Add {W} or {U}.) Prairie Stream enters the battlefield tapped unless you control two or more basic lands.

You have no maximum hand size. {T}: Add {C}.

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

Seachrome Coast enters the battlefield tapped unless you control two or fewer other lands. {T}: Add {W} or {U}.

{1}, {T}: Add {W}{U}.