Mana Titan

Players can't cast more than one nonblue spell
each turn.
Whenever a player casts a blue spell, put a +1/+1 counter on Mana Titan and it gains hexproof
until end of turn.
Recycle {3}{u}{u} ({3}{u}{u}, Exile Mana Titan from
your graveyard: Search your library for an artifact
card with a lower mana value, reveal it, and put it
into your hand, then shuffle your library.)