In addition to the standard mana-fixing and fetch lands, include both Cabal Coffers and Urborg, Tomb of Yawgmoth
An army of 4/2s with Reach is a pretty good reason to bias towards Deserts, plus they tend to find their way into the graveyard naturally, making Yuma all the easier to cast
This does 50 damage to one of their Pokmon if you choose the Skill Dive attack when in play, but they might be too busy taking in the excellent artwork to notice straight away
Just having a 3/3 in play hits the 10-toughness threshold, and in a dedicated high-toughness deck, you can get many more benefits
Instant Color tag templates(None) Confront the Unknown Investigate, then target creature gets +1/+1 until end of turn for each Clue you control
Isochron Scepter + Counterspell or Arcane Denial or Pact of Negation or Mystical Tutor - Pretty self explanatory Temple Bell + Mind Over Matter + Ulamog, the Infinite Gyre