Elvish Archivist 
Creature — Elf Artificer
Whenever one or more artifacts you control enter, put two +1/+1 counters on this creature. This ability triggers only once each turn. Whenever one or more enchantments you control enter, draw a card. This ability triggers only once each turn.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL