The various Merlin cards offer advantages when they are played and when they leave play
Legendary Creature - Human Knight Chatterfang, Squirrel General Forestwalk (This creature can't be blocked as long as defending player controls a Forest.) If one or more tokens would be created under your control, those tokens plus that many 1/1 green Squirrel creature tokens are created instead
The key is to cast cheap spells that you just dont really care all that much about
Aang, Swift Savior / Aang and La, Oceans Fury Making Spell Queller a human and letting it target anything is nice, though airbending is only a temporary solution
That includes a collector booster, promo cart with exclusive art, play booster packs, foil lands, and a spindown die