Presume Authority

This creature can't be taken control of.
Whenever you would draw your second card
each turn, you may instead sacrifice this creature.
If you do, look at the top 5 cards of your library
and put them back in any order, then draw a card
Splice onto creature {2}{u} (As you cast a creature
spell, you may reveal this card from your hand and
pay its splice cost. If you do, add this cards text onto
that spells text.)