Titanoth Rex

The trick this card plays is in the cost of its cycling ability. Nine mana for an 11/11 with trample is a fine top end, but the card is really two spells that never both cost full price: a fatty you hardcast in a durdling game, and a two-mana cantrip you fire when you have nothing better to do with the mana. Discarding a bomb to draw a fresh card is an old hedge against flooding on top-end, but the trample counter turns pitching the giant into an active play rather than a mulligan-of-one. You hand the keyword to something already on the board, so it survives even when the giant does not: it matters most when a wide attacker had no way through a chump blocker. That the counter grants trample specifically (not a generic buff) is the whole point. It converts the largest, least castable card in your deck into a combat-math fixer at instant speed, since the cycling ability can be activated during declare-blockers if you leave the mana open. The 11/11 is the ceiling you rarely reach; the two-mana mode is the floor you reach often, and the floor is what makes the card worth running at all.