Eldrazi Devastator is an 8 mana 8/9 with trample, which should also help with getting over some smaller blockers
If an effect exiles Summon: Esper Maduin and then instructs you to return it to the battlefield, it remains face up in exile (unless that effect instructs you to put it onto the battlefield transformed, in which case it returns as Summon: Esper Maduin)
It is likely to rely on one of your opponents having worthwhile creatures to copy in their graveyard, but the removal available in black will help you to put the right ones in the right place
With any sort of reanimation engine, you can keep bringing back Sakura-Tribe Elder from the graveyard over and over again, getting more and more land to put you ahead of your opponents
Cards like Defiler of Vigor will grow your entire board and make your creatures cheaper in the process while Forgotten Ancient will just casually grow in the background and plop all its value onto an even better attacker
Some require so much setup to be good that you don't really need them at all
