Characters cannot be used on the turn theyre played because, as the Lorcana rulebook says, You need to wait for their ink to dry! After waiting one turn, your now dry characters are free to challenge opposing characters in an attempt to deal enough damage to send them to the discard pile
Drawing two cards for just three ink - or even better, exerting a three-cost character to play it for free is undeniably a great deal for Lorcana
Then, when they enter the battlefield, either each other Creature gets -X/-X until the end of turn, and you lose X life, or you can return up to X Creature cards with a mana value of X or less from your graveyard to the battlefield, and then give them haste until the end of turn
These modal DFCs are number two on the list, not because theyre the most powerful, but because they should be the most carefree addition to every control deck out there
Cloak is to disguise as manifest is to morph (there might be some technical differences
If none have, the ability won't trigger at all