Power-Crux Wizard's

a subclass designed around big burst attacks instead of sustained spell casting. Power-Crux wizard's need to use resources to gain spell slots but have the unique ability to freely upcast any spells given. when it comes to grand use these wizards are very sparce and are more akin to wander sages whose different approach on magic separating them as wizards. also please comment any suggestions this is one of the first subclass ideas so any help would be appreciated.

weave sense

your hunger for more potent spells has unlocked a special sight. you can sense spells that have been casted in the past twelve hours, you can take as an action a ritual that takes 30 minutes per spell slot to add this to their knowledge this saves it for later, they can only have one instance stored where they can then take the time and materials to scribe it within their book 

weave progeny

- your studies of the weave have led to spectacular results. all cantrips and spell damage have your intelligence modifier added on top of its damage this can only be added once per spell attack. 

lifeblood casting

 - magic in its purist form is life the same as which you are built from. instead of consuming a spell slot you may instead take a d10 of damage per level of spell slot used its still treated by the benefits of previous effects acting as if it had been casted normally.

Mana-Break

spell can be destroyed but they always be rewritten. as an action bonus action and a reaction, you can cast any spells in your spell book as long as you the spell slots and the casting time is within one turn. every spell then triggers simultaneously and trigger as if casted normally. after performing this ability, the spell book is permanently destroyed removing all spells found within the book. the remaining weave can still be detected and thusly spells can be gained back by weave sense.

arcane power-crux

- the magic you cast is much more powerful than other casters. all spells cast by you are counted as being upcasted including 9th level spells where either another target can be chosen, an increased duration, or other effect at your DM's discretion. all these effects come at the cost when a spell slot is used you do not recover these spell slots on a long or short rest instead, they are recovered when an enemy dies within your perceivable vicinity whereas a reaction you can absorb their weave granting you a spell slot. this ability is upgraded at 6, and 14. to grant 2. 3 spell slots. spell slots created this way refill the lowest level spell slot before filling higher ones.

spell builder

 as a bonus action you may combine three of the same level spell slots to upgrade it to the next tier these new spell slots can occupy a space even if you do not have a space example you can have two level eights, but you cannot create spells for tiers you have not unlocked yet.