Annotee

I was thinking like a combination of Imprint and Accent (the extra Accent Summoning Condition seen on EVAD). As Special Summon monsters akin to Ritual Monsters they're colored like college-ruled lined paper over the Synchro Monster frame. To summon one, an effect-- preferably not its own unless it's activated and resolved while banished or in the GY-- must give 1 part of its effects to a monster on the user's field. The user must then release, i.e. Tribute, that monster once its effect is put to use.
 * Ignition: Activate the copied effect once;
 * Trigger: Meet the conditions of the copied effect once;
 * Quick: Meet any conditions of the copied effect and/or Activate it once;
 * Continuous: N/A (Free);
 * Unclassified: N/A, if not speficied below:
 * Multiple Tributers: Tribute Summon once, Tributing the copying monster, then banish that Tributed monster from your GY;
 * Ritual Substitutes: Ritual Summon once, Tributing the copying monster, then banish that Tributed monster from your GY;
 * Fusion Substitute Monsters: Fusion Summon once, using the copying monster as a Fusion Material, then banish that fused monster from your GY;
 * Grants effect as Xyz Material: Detach the copying monster from an Xyz Monster;
 * Unconfirmed Effects That Place a Condition on the Field: Release/Tribute the copying monster during the turn it is Summoned.