In terms of support, your deck should likely include as less non-Character cards as possible
Contents: Universes Beyond: Doctor Who MTG cards + 1 double-sided foil token Case Configuration: 12 packs per display / 24 displays per carton Pack Dimensions: 0.197" x 2.480" x 5.197" (5 x 63 x 132mm) Pack Weight: 0.075 lb
Otherwise, put it into your hand. Putting a card into your hand is nice, but you can literally win games by just combining Meren with Spore Frog, which you can sacrifice to prevent all combat damage for a turn - and only costs one mana
Toxic 10 Celestial Gatekeeper + Dual Nature + Phyrexian Altar on Commander Spellbook Since the cowards at Wizards of the Coast wouldnt print Glistensteel Colossus, I had to find my own way to give a creature a total Toxic value of 10
If you just want as much ramp as possible, maybe you run this card, but I think you can do better
For now though, it seems like all four are worth checking out