The morph is rarely of use, particularly as the only monster in the A cube with morph somewhat reducing the surprise factor
It has the Vedalken Orrery issue where you cross your fingers you untap with it, plus the Crucible of Worlds problem where its no longer unique
Mana Vault can easily be exploited to tap for large amounts of mana, and that's worth taking some damage in the process
Can your opponent still end the game with a card like Thassas Oracle , Halo Fountain , or Nicol Bolas, Dragon-God
1 Venusaur: Base Set First Edition (Holo Rare) $849.28 The Crown Jewel Of Venusaur Cards The Holy Grail set for almost every one of the original generation of Pokemon has to be the shadowless version of the Base Set
First, it was part of the non-timeshifted lands with keywords cycle (it tapped for blue and came into play tapped back then)