Transform is a keyword action introduced in Innistrad and means to turn a double-faced card on the back side, changing the card face that is visible.

Do transformed creatures have a mana cost?

If a permanent is copying the back face of a double-faced card (even if the card representing that copy is itself a double-faced card), the converted mana cost of that permanent is 0. Transformed cards don’t help with devotion. They don’t have a mana cost so they don’t have any colored mana symbols to count up.

Is transform an activated ability?

yes, the transform of the delver is a triggered ability.

Do creatures that transform have summoning sickness?

Transforming doesn’t give a permanent “summoning sickness,” so if a creature has been under your control continuously since the beginning of your turn, it can still attack even if it transforms—assuming it transforms into a creature!

Do transform cards untap?

when you tap a creature for an ability and then use his transform ability and he changes into the other creature, does he become untappped? No. Transforming doesn’t change the other statuses of the permanent such as tapped/untapped.

Can you morph from graveyard?

Yes, if you can cast creatures from your graveyard you may cast those with morph as a facedown spell.

How to sacrifice a creature in Magic The Gathering?

, , Sacrifice a creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature’s mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery. Black Carriage doesn’t untap during your untap step. Sacrifice a creature: Untap Black Carriage.

What happens when you sacrifice an untapped creature?

Sacrifice an untapped creature: Enchanted creature gets +2/+0 until end of turn. Sacrifice enchanted creature: Creatures you control get +2/+0 until end of turn. Devoid (This card has no color.) When Birthing Hulk enters the battlefield, create two 1/1 colorless Eldrazi Scion creature tokens. They have “Sacrifice this creature: Add .”

When do you sacrifice a creature in Cabal therapy?

At the beginning of your precombat main phase, you may sacrifice a creature. When you do, choose a nonland card name, then target player reveals their hand and discards all cards with that name. Cabal Therapy (1)

What happens when you sacrifice an artifact in RuneScape?

, Sacrifice an artifact: Choose any kind of counter a printed card refers to, then put one of that counter on target permanent. , Sacrifice a creature: Target creature gets -2/-2 until end of turn. , Exile a creature card from your graveyard: Target creature gets -2/-2 until end of turn.