Captain Jean-Luc Picard 2UG
Legendary Creature - Human
Whenever a player casts a spell, if it does not share a name with a card in that player's graveyard, draw a card.
Whenever a creature enters the battlefield, if it does not share a name with a card in that player's graveyard, draw a card.
At the end of the turn, if 3 or more cards were drawn this turn, transform ~.
2/3
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Locutus of Borg (UB Color Identity)
Legendary Creature - Human Construct
When this creature transforms into ~, put X +1/+1 counters onto ~, where X equals the number of cards in your hand.
Whenever ~ blocks or is blocked, you may pay 1UB. If you do, remove a +1/+1 counter from ~ and place it on target blocking or blocked creature. That creature becomes a Construct in addition to its other types, and is blue and black in addition to its other colors. Gain control of that creature for as long as you control ~ or it has a +1/+1 counter on it.
When ~ has no +1/+1 counters on it, transform ~.
4/4
I have other ideas, but none that I can actually formulate into cards at the moment.