Celui la ne permet pas de faire apparaitre un bloqueur

Heu... Sagesse accumulée, gros potentiel

Faudrait faire une variation du format primordial qui prend toutes les cartes de l'extension+ les commanders decks + les mystical archive et autres joyeusetés.

je ne comprends pas ta remarque
l'autre spell que tu cites ne le permet pas non plus
je n'ai pas utilise le moteur que tu cites mais un sort qui fait aparaitre un bloqueur surprise ça serait pas plutôt en ?

Moins puissant donc.

Returning Mechanic: Clue Tokens
Unlike in previous sets, Clue tokens aren't created by the investigate ability. They are just a predefined token cards sometimes create.
[...]
Creating a Clue token this way isn't the same thing as investigating. Notably, an ability that triggers whenever you investigate won't trigger because of creating a Clue token this way.

Clue tokens began as a tool to solve a problem. We wanted investigate to be a keyword, but having it directly draw you cards was proving to be too powerful. We asked, was there a way to draw half a card? That led us to the idea of an artifact token that required you to spend mana to get the card.

Clue tokens were so successful that they opened the door to artifact tokens as a design tool where we built sets around a single, flavorfully named token that had a basic effect. Unlike all the artifact tokens that followed in its wake, Clue tokens are tied to a named mechanic, investigate. Technically, we are allowed to make Clue tokens without having to "investigate" first, but we've found the word very flavorful.

We started by giving the mechanic a name. We wanted to call it "investigate." What exactly would investigate do? Obviously it had to have some tie to card drawing. It helped out the first mechanical need above and it clearly matched the flavor. Investigating would led to more information (aka cards).
[...]
The mini-team chose to look to the story for inspiration. One of the little details that had come out in world building was there were a lot of these quirky little bent stone items known as cluestones.

That led them down the path of investigate finding you clues or cluestones. What if investigating created an artifact token? And not just any artifact token, a cluestone? Okay, what would the cluestone, or Clue as it was eventually called, do? The design needed card flow. What if the artifact could be sacrificed to draw a card? The mini-team put a mana cost on it as otherwise it would essentially be just "draw a card" and wouldn't need the artifact. The mana cost was also a knob that development could tweak if they needed.
[...]
they played around with different mana costs, but two ended up playing the best. It was enough to mean something but not so much that it became hard to get the card.

That meant the first set, Shadows over Innistrad, would be all about investigating strange occurrences [...]

We really wanted a mechanic named investigate to capture a sense of investigation. What exactly would investigate do? Drawing cards seemed like the cleanest answer. When you investigate, you learn things. The problem was that it resulted in too much card draw. So, we asked ourselves if there was a way to draw half a card? It turns out there was. We could create an artifact token, a Clue, that let you pay and sacrifice it to draw a card. Investigate got you halfway to drawing a card, which allowed us to put a lot more of the mechanic into the set.

Clue tokens proved to be a major step forward for Magic design. Players could use them to draw cards, but now we had this object that we could design elements of the set around. Its mere existence meant we could make cards that cared about that permanent being on the battlefield. It was specifically an artifact, so it could be part of an "artifacts matter" theme. You could sacrifice it for other effects. It was both super flavorful and useful from a structural standpoint. It was the beginning of a new vein of token design, where a singular noncreature token could be a key component of a set's structure.